Inventor

BIRKENHEUER STEFAN

CN5 patents

⚠️ This page may combine multiple inventors who share the name “BIRKENHEUER STEFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHEMETALL GMBH

4 patents

US12043758B2Jul 23, 2024

Method for treating metallic surfaces with an acidic aqueous composition to improve corrosion resistance

CHEMETALL GMBH0 citations56

US11346002B2May 31, 2022

Composition for coating of metallic surfaces with good adhesion, in particular aluminum materials

CHEMETALL GMBH0 citations47

US12043753B2Jul 23, 2024

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 GMBH0 citations44

US11441226B2Sep 13, 2022

Method for anti-corrosion pre-treatment of a metal surface containing steel, galvanised steel, aluminium, magnesium and/or a zinc-magnesium alloy

CHEMETALL GMBH0 citations44

SPECIALTY OPERATIONS FRANCE

1 patent

US12049571B2Jul 30, 2024

Method for treating metallic surfaces with an acidic aqueous composition and a post rinsing composition to improve corrosion resistance

SPECIALTY OPERATIONS FRANCE0 citations45