Bertkau; Walter

Patent Applications and Registrations

Patent applications and USPTO patent grants for Bertkau; Walter.The latest application filed is for "process for acidizing using retarded acid formulations".

Company Profile

2.11.13

Bertkau; Walter - Ludwigshafen 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
Production of leather Grant 11,001,902 - Bertkau , et al. May 11, 2	2021-05-11
Process for acidizing using retarded acid formulations Grant 10,131,831 - Rimassa , et al. November 20, 2	2018-11-20
Process For Acidizing Using Retarded Acid Formulations App 20170037304 - Rimassa; Shawn ; et al.	2017-02-09
Production Of Leather App 20150376726 - BERTKAU; Walter ; et al.	2015-12-31
Process For Dissolving Deposits Comprising Alkaline Earth Metal Sulfates App 20150175872 - Bertkau; Walter ; et al.	2015-06-25
Alkanesulfonic acid microcapsules and use thereof in deep wells Grant 8,863,841 - Bertkau , et al. October 21, 2	2014-10-21
Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups Grant 8,568,522 - Klippel , et al. October 29, 2	2013-10-29
Continuous method for treating the surface of metal strips Grant 8,372,216 - Vandermeulen , et al. February 12, 2	2013-02-12
Alkanesulfonic Acid Microcapsules And Use Thereof In Deep Wells App 20120222863 - BERTKAU; Walter ; et al.	2012-09-06
Method for coating metals Grant 8,163,395 - Witteler , et al. April 24, 2	2012-04-24
Method For Passivating A Metallic Surface App 20120080120 - Fe enbecker; Achim ; et al.	2012-04-05
Method for the passivation of metal surfaces with compositions comprising polymers with acid groups and waxes Grant 7,905,964 - Witteler , et al. March 15, 2	2011-03-15
Continuous Method For Treating The Surface Of Metal Strips App 20110017352 - Vandermeulen; Guido ; et al.	2011-01-27
Method For Coating Zinc-plated Steel Strips With Aqueous Formulations Of Acidic Polymers App 20100224286 - Bertkau; Walter	2010-09-09
Method for the passivation of metal surfaces with polymers containing acid groups Grant 7,749,337 - Witteler , et al. July 6, 2	2010-07-06
Method Of Passivating Metallic Surfaces By Means Of Copolymers Having Phosphoric Acid And/or Phosphonic Acid Groups App 20090324839 - Klippel; Frank ; et al.	2009-12-31
Method for Coating Metals App 20090208735 - Witteler; Helmut ; et al.	2009-08-20
Method for Producing Painted, Flat Metallic Moulded Bodies App 20080197020 - Witteler; Helmut ; et al.	2008-08-21
Method For the Passivation of Metal Surfaces With Compositions Comprising Polymers With Acid Groups and Waxes App 20080199714 - Witteler; Helmut ; et al.	2008-08-21
Detachable Protecting Films App 20080152820 - Witteler; Helmut ; et al.	2008-06-26
Method for the Passivation of Metal Surfaces with Polymers Containing Acid Groups App 20070240792 - Witteler; Helmut ; et al.	2007-10-18

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