Patents/Inventors

Stefan Birkenheuer

ShanghaiCN1 patent

3 Patents

US120495712024
Method for Treating Metallic Surfaces with an Acidic Aqueous Composition and a Post Rinsing Composition to Improve Corrosion Resistance
SPECIALTY OPERATIONS FRANCE
0 cites
US120437532024
Process for Corrosion-protecting Pretreatment of a Metallic Surface Containing Steel, Galvanized Steel, Aluminum, an Aluminum Alloy, Magnesium And/or a Zinc-magnesium Alloy
CHEMETALL GmbH
0 cites
US120437582024
Method for Treating Metallic Surfaces with an Acidic Aqueous Composition to Improve Corrosion Resistance
SPECIALTY OPERATIONS FRANCE
0 cites