Lettmann; Christian

Patent Applications and Registrations

Patent applications and USPTO patent grants for Lettmann; Christian.The latest application filed is for "process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine".

Company Profile

0.15.21

Lettmann; Christian - Coesfeld N/A DE
Lettmann; Christian - Essen 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 3-aminomethyl-3,5,5-trimethylcyclohexylamine Grant 9,085,506 - Galle , et al. July 21, 2	2015-07-21
Method for preparing diamino-dianhydro-dideoxyhexitols, particularly preferably 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxy-D-hexitol Grant 9,029,412 - Streukens , et al. May 12, 2	2015-05-12
Process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine Grant 8,877,976 - Lettmann , et al. November 4, 2	2014-11-04
Process For Preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine App 20130261341 - Lettmann; Christian ; et al.	2013-10-03
Process For Preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine App 20130253226 - Galle; Markus ; et al.	2013-09-26
Low chlorine, multi-staged method for producing cycloaliphatic disocyanates Grant 8,536,370 - Grund , et al. September 17, 2	2013-09-17
Composite Film And Packaging Produced Therefrom App 20130118128 - LUECKE; Andreas ; et al.	2013-05-16
Method For Preparing Diamino-dianhydro-dideoxyhexitols, Particularly Preferably 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxy-d-hexitol App 20130116451 - Streukens; Guido ; et al.	2013-05-09
Method for producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione Grant 8,378,127 - Dingerdissen , et al. February 19, 2	2013-02-19
Method For Producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione App 20110269977 - Dingerdissen; Uwe ; et al.	2011-11-03
Method for production of trimethylhexamethylenediamine Grant 8,003,826 - Lettmann , et al. August 23, 2	2011-08-23
Low Chlorine, Multi-staged Method For Producing Cycloaliphatic Disocyanates App 20110028755 - Grund; Gerda ; et al.	2011-02-03
Method For Production Of Trimethylhexamethylenediamine App 20100094058 - Lettmann; Christian ; et al.	2010-04-15
Process For Preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine App 20100041921 - Lettmann; Christian ; et al.	2010-02-18
Formaldehyde-free, Carbonyl- And Ring-hydrogenated Ketone-aldehyde Resins Based On Alkyl Aryl Ketones And Formaldehyde Which Have A Low Oh Functionality And A Process For Preparing Them App 20090198024 - Glockner; Patrick ; et al.	2009-08-06
Formaldehyde-free, Oh-functional, Carbonyl- And Ring-hydrogenated Ketone-aldehyde Resins Based On Alkyl Aryl Ketones And Formaldehyde And A Process For Preparing Them App 20090099332 - Glockner; Patrick ; et al.	2009-04-16
Process For Preparing Amines By Conditioning The Catalyst With Ammonia App 20090048466 - Lettmann; Christian ; et al.	2009-02-19
Carbonyl Hydrogenated Ketone Aldehyde Resins, Devoid Of Formaldehyde, Based On Formaldehyde And Associated Production Method App 20090012245 - Glockner; Patrick ; et al.	2009-01-08
Process for increasing the selectivity of the hydrogenation of 4,4'-diaminodiphenylmethane to 4,4'-diaminodicyclohexylmethane in the presence of an N-alkyl-4,4'-diaminodiphenylmethane Grant 7,091,384 - Jaeger , et al. August 15, 2	2006-08-15
Automated method for examining catalytic and spectroscopic properties of the components of combinatorial libraries Grant 7,052,914 - Maier , et al. May 30, 2	2006-05-30
Method for synthesis of aliphatic isocyanates from aromatic isocyanates Grant 6,924,385 - Lettmann , et al. August 2, 2	2005-08-02
Process for increasing the selectivity of the hydrogenation of 4,4'-diaminodiphenylmethane to 4,4'-diaminodicyclohexylmethane in the presence of an n-alkyl-4,4'-diaminodiphenylmethane App 20050148797 - Jaeger, Bernd ; et al.	2005-07-07
Method for hydrogenation of aromatic urethanes in the presence of a supported ruthenium catalyst Grant 6,809,215 - Finke , et al. October 26, 2	2004-10-26
Method for synthesis of aliphatic isocyanates from aromatic isocyanates App 20040097752 - Lettmann, Christian ; et al.	2004-05-20
Method for hydrogenation of aromatic urethanes in the presence of a supported rutheniun catalyst App 20040097661 - Finke, Norbert ; et al.	2004-05-20
Automated method for examining catalytic and spectroscopic properties of the components of combinatorial libraries App 20020135753 - Maier, Wilhelm ; et al.	2002-09-26
Process For The Preparation Of 3-aminomethyl-3, 5,5-trimethylcyclohexylami- Ne App 20020137970 - Ostgard, Daniel ; et al.	2002-09-26

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