Stroefer; Eckhard

Patent Applications and Registrations

Patent applications and USPTO patent grants for Stroefer; Eckhard.The latest application filed is for "process for preparing polyoxymethylene dimethyl ethers from formaldehyde and methanol in aqueous solutions".

Company Profile

0.96.97

Stroefer; Eckhard - Mannheim DE

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Process for preparing polyoxymethylene dimethyl ethers from formaldehyde and methanol in aqueous solutions Grant 10,377,689 - Burger , et al. A	2019-08-13
Process For Preparing Polyoxymethylene Dimethyl Ethers From Formaldehyde And Methanol In Aqueous Solutions App 20180134642 - BURGER; Jakob ; et al.	2018-05-17
Process for the preparation of nitrated aromatics and mixtures thereof Grant 9,079,822 - Mackenroth , et al. July 14, 2	2015-07-14
Method for purifying residues containing isocyanates Grant 9,061,971 - Wolfert , et al. June 23, 2	2015-06-23
Process For The Preparation Of Nitrated Aromatics And Mixtures Thereof App 20150166461 - MACKENROTH; Wolfgang ; et al.	2015-06-18
Process and apparatus for preparing isocyanates Grant 9,006,481 - Mattke , et al. April 14, 2	2015-04-14
Process for coproducing di- and/or polyisocyanates and glycols Grant 9,000,213 - Bock , et al. April 7, 2	2015-04-07
Process for preparing polyisocyanates from biomass Grant 8,933,262 - Stroefer , et al. January 13, 2	2015-01-13
Process for preparing isocyanates Grant 8,859,805 - Mattke , et al. October 14, 2	2014-10-14
Process for preparing an isocyanate Grant 8,853,443 - Breuninger , et al. October 7, 2	2014-10-07
Process for the preparation of light-colored iocyanates of a diphenylmethanediisocyanate series Grant 8,841,480 - Schelling , et al. September 23, 2	2014-09-23
Process for preparing isocyanates Grant 8,835,673 - Mattke , et al. September 16, 2	2014-09-16
Process for preparing aromatic isocyanates Grant 8,829,232 - Penzel , et al. September 9, 2	2014-09-09
Process for preparing isocyanates by thermally cleaving carbamates Grant 8,822,718 - Bock , et al. September 2, 2	2014-09-02
Process for preparing isocyanates Grant 8,772,535 - Boehling , et al. July 8, 2	2014-07-08
Process for the production of isocyanates, preferably diisocyanates and polyisocyanates with solvent recirculation Grant 8,759,569 - Schelling , et al. June 24, 2	2014-06-24
Process for preparing light-coloured isocyanates of the diphenylmethane series Grant 8,748,655 - Schelling , et al. June 10, 2	2014-06-10
Process for preparing MDA via the stage of the aminal Grant 8,710,267 - Stroefer , et al. April 29, 2	2014-04-29
Process for preparing isocyanates and/or polyisocyanates Grant 8,686,182 - Leschinski , et al. April 1, 2	2014-04-01
Process for the preparation of aromatic formamides Grant 8,680,333 - Franzke , et al. March 25, 2	2014-03-25
Process for preparing isocyanates by thermal dissociation of carbamates Grant 8,680,323 - Bock , et al. March 25, 2	2014-03-25
Method for producing color-stable MDA and MDI Grant 8,614,352 - Stroefer , et al. December 24, 2	2013-12-24
Process for preparing mononitrated organic compounds Grant 8,592,637 - Denissen , et al. November 26, 2	2013-11-26
Method for producing polyisocyanates Grant 8,546,606 - Brodhagen , et al. October 1, 2	2013-10-01
Process for the preparation of isocyanates Grant 8,546,605 - Kloetzer , et al. October 1, 2	2013-10-01
Trioxane production method wherein a side aqueous flow is deducted at a first distillation stage Grant 8,530,678 - Siegert , et al. September 10, 2	2013-09-10
Method of measuring entry of water into phosgene-conducting plants Grant 8,519,179 - Schelling , et al. August 27, 2	2013-08-27
Process for preparing isocyanates Grant 8,492,580 - Geissler , et al. July 23, 2	2013-07-23
Integrated method for the preparation of trioxane from formaldehyde Grant 8,450,507 - Siegert , et al. May 28, 2	2013-05-28
Method for treating residues from the production of isocyanates Grant 8,440,856 - Bock , et al. May 14, 2	2013-05-14
Method for producing isocyanates Grant 8,436,204 - Knoesche , et al. May 7, 2	2013-05-07
Process For Preparing Isocyanates And/or Polyisocyanates App 20130109883 - Leschinski; Julia ; et al.	2013-05-02
Process for preparing polyoxymethylene homopolymers or copolymers by homopolymerization or copolymerization of trioxane, starting from methanol Grant 8,378,144 - Siegert , et al. February 19, 2	2013-02-19
Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification Grant 8,372,993 - Lang , et al. February 12, 2	2013-02-12
Method for separating tioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification Grant 8,350,063 - Siegert , et al. January 8, 2	2013-01-08
Process For Preparing Polyisocyanates From Biomass App 20120302786 - Stroefer; Eckhard ; et al.	2012-11-29
Process for preparing isocyanates Grant 8,288,584 - Knoesche , et al. October 16, 2	2012-10-16
Process For Preparing Isocyanates App 20120253063 - Mattke; Torsten ; et al.	2012-10-04
Process For The Preparation Of Aromatic Formamides App 20120253072 - Franzke; Axel ; et al.	2012-10-04
Process For Preparing Isocyanates By Thermally Cleaving Carbamates App 20120245377 - Bock; Michael ; et al.	2012-09-27
Process for preparing isocyanates Grant 8,273,915 - Rumpf , et al. September 25, 2	2012-09-25
Method for producing isocyanates Grant 8,258,337 - Woelfert , et al. September 4, 2	2012-09-04
Process For Coproducing Di- And/or Polyisocyanates And Glycols App 20120209024 - Bock; Michael ; et al.	2012-08-16
Process For Preparing Isocyanates App 20120197038 - Bohling; Ralf ; et al.	2012-08-02
Process For Preparing Light-coloured Isocyanates Of The Diphenylmethane Series App 20120172620 - Schelling; Heiner ; et al.	2012-07-05
Process For Preparing Isocyanates App 20120172621 - Mattke; Torsten ; et al.	2012-07-05
Process for preparing isocyanates Grant 8,212,069 - Boehling , et al. July 3, 2	2012-07-03
Process For Preparing Mononitrated Organic Compounds App 20120157722 - Denissen; Leo ; et al.	2012-06-21
Method for producing isocyanates Grant 8,193,385 - Kloetzer , et al. June 5, 2	2012-06-05
Method Of Measuring Entry Of Water Into Phosgene-conducting Plants App 20120108844 - Schelling; Heiner ; et al.	2012-05-03
Process For The Preparation Of Light-colored Iocyanates Of A Diphenylmethanediisocyanate Series App 20120108843 - Schelling; Heiner ; et al.	2012-05-03
Method for producing isocyanates Grant 8,168,818 - Daiss , et al. May 1, 2	2012-05-01
Process For The Production Of Isocyanates, Preferably Diisocyanates And Polyisocyanates With Solvent Recirculation App 20120101299 - Schelling; Heiner ; et al.	2012-04-26
Method For Producing Color-stable Mda And Mdi App 20120046497 - Stroefer; Eckhard ; et al.	2012-02-23
Process For Preparing Mda Via The Stage Of The Aminal App 20120035396 - Stroefer; Eckhard ; et al.	2012-02-09
Method for producing chlorine Grant 8,097,232 - Sesing , et al. January 17, 2	2012-01-17
Process And Apparatus For Preparing Isocyanates App 20120004446 - Mattke; Torsten ; et al.	2012-01-05
Method for the purification of isocyanates Grant 8,088,944 - Woelfert , et al. January 3, 2	2012-01-03
Heterogeneously Catalyzed Carbamate Dissociation For Synthesis Of Isocyanates Over Solid Lewis Acids App 20110313192 - ROSENDAHL; Tobias ; et al.	2011-12-22
Process For The Preparation Of Nitrated Aromatics And Mixtures Thereof App 20110306795 - Mackenroth; Wolfgang ; et al.	2011-12-15
Process For Preparing An Isocyanate App 20110263892 - Breuninger; Daniel ; et al.	2011-10-27
Process for preparing pentamethylene 1,5-diisocyanate Grant 8,044,166 - Fiene , et al. October 25, 2	2011-10-25
Process For Preparing Aromatic Isocyanates App 20110251425 - Penzel; Ulrich ; et al.	2011-10-13
Method for producing isocyanates Grant 8,026,387 - Kloetzer , et al. September 27, 2	2011-09-27
Process For Preparing Isocyanates App 20110207961 - Geissler; Bernhard ; et al.	2011-08-25
Method for the production of polyoxymethylene dialkyl ethers from trioxan and dialkylethers Grant 7,999,140 - Stroefer , et al. August 16, 2	2011-08-16
Moderate-pressure gas phase phosgenation Grant 7,994,361 - Woelfert , et al. August 9, 2	2011-08-09
Process For Preparing Isocyanates By Thermal Dissociation Of Carbamates App 20110178329 - BOCK; Michael ; et al.	2011-07-21
Process For Preparing Isocyanates App 20110124908 - Rumpf; Bernd ; et al.	2011-05-26
Method for operating a liquid ring compressor Grant 7,927,080 - Muller , et al. April 19, 2	2011-04-19
Method for producing diisocyanates Grant 7,915,444 - Woelfert , et al. March 29, 2	2011-03-29
Method for producing polyisocyanates Grant 7,897,806 - Sesing , et al. March 1, 2	2011-03-01
Method For Treating Residues From The Production Of Isocyanates App 20110021836 - Bock; Michael ; et al.	2011-01-27
Method For The Production Of Crude Trioxane App 20100324311 - Siegert; Markus ; et al.	2010-12-23
Process For Preparing Isocyanates App 20100317889 - Boehling; Ralf ; et al.	2010-12-16
Method for the continuous production of isocyanates Grant 7,851,648 - Sohn , et al. December 14, 2	2010-12-14
Process For Preparing Polyoxymethylene Homopolymers Or Copolymers By Homopolymerization Or Copolymerization Of Trioxane, Starting From Methanol App 20100280195 - Siegert; Markus ; et al.	2010-11-04
Method For Producing Isocyanates App 20100274046 - Kloetzer; Matthias ; et al.	2010-10-28
Method For Separating Tioxane From A Trioxane/formaldehyde/water Mixture By Means Of Pressure Change Rectification App 20100270140 - Siegert; Markus ; et al.	2010-10-28
Method For Preparing Isocyanate Adducts App 20100227997 - Fiene; Martin ; et al.	2010-09-09
Process For Preparing Isocyanates App 20100217035 - Knoesche; Carsten ; et al.	2010-08-26
Method for the production of dioxolane Grant 7,754,900 - Siegert , et al. July 13, 2	2010-07-13
Integrated Method For Producing Trioxane From Formaldehyde App 20100152466 - Lang; Neven ; et al.	2010-06-17
Reactor and method for producing chlorine from HCl Grant 7,736,598 - Seidemann , et al. June 15, 2	2010-06-15
Method For Producing Cyclic Formaldehyde Derivatives From Polyoxy Dialkyl Ethers App 20100145079 - Stroefer; Eckhard ; et al.	2010-06-10
Method For Producing Trioxane From Trioxymethylene Glycol Dimethyl Ether App 20100130756 - Stroefer; Eckhard ; et al.	2010-05-27
Method For Separating Trioxane From A Trioxane/formaldehyde/water Mixture By Means Of Pressure Change Rectification App 20100121081 - Lang; Neven ; et al.	2010-05-13
Initial compounds for producing polyurethanes Grant 7,705,106 - Groer , et al. April 27, 2	2010-04-27
Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde Grant 7,700,809 - Stroefer , et al. April 20, 2	2010-04-20
Method For Producing Isocyanates App 20100076218 - Daiss; Andreas ; et al.	2010-03-25
Method For Producing Isocyanates App 20100056822 - Daiss; Andreas ; et al.	2010-03-04
Method for producing polyoxymethylene dimethyl ethers from methanol and formaldehyde Grant 7,671,240 - Stroefer , et al. March 2, 2	2010-03-02
Method For Producing Isocyanates App 20100041915 - Woelfert; Andreas ; et al.	2010-02-18
Method for separating hydrogen chloride and phosgene Grant 7,659,430 - Woelfert , et al. February 9, 2	2010-02-09
Process For Preparing Pentamethylene 1,5-diisocyanate App 20090292100 - Fiene; Martin ; et al.	2009-11-26
Method For Producing Isocyanates App 20090281350 - Knoesche; Carsten ; et al.	2009-11-12
Method For Producing Isocyanates App 20090275775 - Kloetzer; Matthias ; et al.	2009-11-05
Reprocessing of reaction material discharged from phosgenation reactors Grant 7,592,479 - Stroefer , et al. September 22, 2	2009-09-22
Separation of a substance mixture consisting of hydrogen chloride and phosgene Grant 7,584,629 - Sohn , et al. September 8, 2	2009-09-08
Method For Producing Isocyanates App 20090221846 - Wolfert; Andreas ; et al.	2009-09-03
Integrated Method For The Preparation Of Trioxane From Formaldehyde App 20090187033 - Siegert; Markus ; et al.	2009-07-23
Method For Producing Polyisocyanates App 20090112017 - Sesing; Martin ; et al.	2009-04-30
Method For Producing Polyisocyanates App 20090112018 - Sesing; Martin ; et al.	2009-04-30
Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent Grant 7,524,405 - Sohn , et al. April 28, 2	2009-04-28
Process for Producing Trioxane and at Least One Comonomer App 20080283384 - Lang; Neven ; et al.	2008-11-20
Integrated Method For the Production of Trioxane From Formaldehyde App 20080281109 - Lang; Neven ; et al.	2008-11-13
Method For Purifing Residues Containing Isocyanates App 20080262263 - Wolfert; Andreas ; et al.	2008-10-23
Method For the Production of Dioxolane App 20080255376 - Siegert; Markus ; et al.	2008-10-16
Process for the Preparation of Isocyanates App 20080249332 - Klotzer; Matthias ; et al.	2008-10-09
Method For the Production of Chlorine By Means of Gas Phase Oxidation of Hydrogen Chloride App 20080233043 - Olbert; Gerhard ; et al.	2008-09-25
Process for Preparing Polyoxymethylene Dimethyl Ethers from Methanol and Formaldehyde App 20080221368 - Stroefer; Eckhard ; et al.	2008-09-11
Biodiesel Fuel Mixture Containing Polyoxymethylene Dialkyl Ether App 20080216390 - Tebben; Gerd-Dieter ; et al.	2008-09-11
Method for Producing Polyoxymethylene Dimethyl Ethers From Methanol and Formaldehyde App 20080207954 - Stroefer; Eckhard ; et al.	2008-08-28
Method for the Production of Polyoxymethylene Dialkyl Ethers from Trioxan and Dialkylethers App 20080207955 - Stroefer; Eckhard ; et al.	2008-08-28
Mdi Production By Means of Liquid Phase and Gas Phase Phosgenation App 20080200721 - Muller; Christian ; et al.	2008-08-21
Method For Producing Diisocyanates App 20080200722 - Wolfert; Andreas ; et al.	2008-08-21
Separation of liquid mixtures in a film evaporator Grant 7,414,159 - Stroefer , et al. August 19, 2	2008-08-19
Integrated Process For Preparing Trioxane From Formaldehyde App 20080194845 - Lang; Neven ; et al.	2008-08-14
Method for the production of diaminodiarylmethanes Grant 7,408,083 - Steinbrenner , et al. August 5, 2	2008-08-05
Mmdi and Pmdi Production By Means of Gas Phase Phosgenation App 20080171894 - Muller; Christian ; et al.	2008-07-17
Method For Producing Chlorine App 20080159948 - Sesing; Martin ; et al.	2008-07-03
Method for the purification of isocyanates Grant 7,358,388 - Woelfert , et al. April 15, 2	2008-04-15
Production of high-concentration formaldehyde solutions Grant 7,345,207 - Stroefer , et al. March 18, 2	2008-03-18
Method for the distillative recovery of toluylenediamine Grant 7,342,134 - Knoesche , et al. March 11, 2	2008-03-11
Method for Separating Hydrogen Chloride and Phosgene App 20070293707 - Wolfert; Andreas ; et al.	2007-12-20
Trioxane Production Method Wherein A Side Aqueous Flow Is Deducted At A First Distillation Stage App 20070293689 - Siegert; Markus ; et al.	2007-12-20
Method for the Separation by Distillation of Pure Trioxane App 20070293688 - Siegert; Markus ; et al.	2007-12-20
Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification App 20070272540 - Siegert; Markus ; et al.	2007-11-29
Method for Operating a Liquid Ring Compressor App 20070269309 - Muller; Christian ; et al.	2007-11-22
Method for Producing Polyoxymethylene Dimethyl Ethers App 20070260094 - Schelling; Heiner ; et al.	2007-11-08
Isocyanate Production Method App 20070232827 - Wolfert; Andreas ; et al.	2007-10-04
Fluidized Bed Method And Reactor For Carrying Out Exotermic Chemical Equilibruim Reaction App 20070202035 - Walsdorff; Christian ; et al.	2007-08-30
Reactor and method for producing chlorine from hcl App 20070183963 - Seidemann; Lothar ; et al.	2007-08-09
Method for separating trioxane from a mixture containing trioxane, formaldehyde and water App 20070155972 - Lang; Neven ; et al.	2007-07-05
Use of H2S-containing offgas streams for preparing sulfur-containing products Grant 7,235,697 - Muller , et al. June 26, 2	2007-06-26
Method for producing formaldehyde App 20070142677 - Olbert; Gerhard ; et al.	2007-06-21
Method for producing highly concentrated formaldehyde solution App 20070135660 - Rumpf; Bernd ; et al.	2007-06-14
Separation of liquid mixtures in a film evaporator App 20070106096 - Stroefer; Eckhard ; et al.	2007-05-10
Method for the distillative recovery of toluylenediamine App 20070083065 - Knoesche; Carsten ; et al.	2007-04-12
Method for producing isocyanates Grant 7,179,935 - Stroefer , et al. February 20, 2	2007-02-20
Method for the purification of isocyanates App 20070015934 - Wolfert; Andreas ; et al.	2007-01-18
Method for the production of diaminodiarylmethanes App 20070010692 - Steinbrenner; Ulrich ; et al.	2007-01-11
Method for the production of chlorine App 20060263290 - Walsdorff; Christian ; et al.	2006-11-23
Method for the continuous production of isocyanates App 20060252960 - Sohn; Martin ; et al.	2006-11-09
Method for producing polyisocyanates App 20060223966 - Brodhagen; Andreas ; et al.	2006-10-05
Method for producing isocyanates Grant 7,112,694 - Woelfert , et al. September 26, 2	2006-09-26
Method for the preparation of highly concentrated formaldehyde solutions App 20060211841 - Stroefer; Eckhard ; et al.	2006-09-21
Initial compounds for producing polyurethanes App 20060205915 - Groer; Peter ; et al.	2006-09-14
Method for preparing highly concentrated, gaseous formaldehydes App 20060185513 - Stroefer; Eckhard ; et al.	2006-08-24
Preparation of thiols App 20060173218 - Muller; Christian ; et al.	2006-08-03
Production of isocyanates in the gaseous phase Grant 7,084,297 - Woelfert , et al. August 1, 2	2006-08-01
Catalyst for the catalytic oxidation of hydrogen chloride App 20060140849 - Kuhrs; Christian ; et al.	2006-06-29
Method for the purification of isocyanates App 20060135810 - Wolfert; Andreas ; et al.	2006-06-22
Use of H2S-containing offgas streams for preparing sulfur-containing products App 20060128994 - Muller; Christian ; et al.	2006-06-15
Separation of a substance mixture consisting of hydrogen chloride and phosgene App 20060123842 - Sohn; Martin ; et al.	2006-06-15
Method for the production of isocyanates App 20060116529 - Wolfert; Andreas ; et al.	2006-06-01
Method for producing chlorine from hydrochloric from hydrochloric aid App 20060099138 - Walsdorff; Christian ; et al.	2006-05-11
Method for separating isocyanates out from a reaction mixture App 20060089507 - Sohn; Martin ; et al.	2006-04-27
Method for seperating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent App 20060011463 - Sohn; Martin ; et al.	2006-01-19
Method for producing isocyanates App 20050154227 - Stroefer, Eckhard ; et al.	2005-07-14
Production of isocyanates in the gaseous phase App 20050070734 - Wolfert, Andreas ; et al.	2005-03-31
Method for producing isocynates Grant 6,833,469 - Wolfert , et al. December 21, 2	2004-12-21
Method for producing isocynates App 20040192959 - Woelfert, Andreas ; et al.	2004-09-30