Inventor
GOTTWALD KARL-HEINZ
DE11 patents
⚠️ This page may combine multiple inventors who share the name “GOTTWALD KARL-HEINZ”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HENKEL KGAA
8 patentsUS6090224AJul 18, 2000
Phosphating process with a copper-containing re-rinsing stage
HENKEL KGAA20 citations92
US5207840AMay 4, 1993
Process for preparing zinc phosphate coatings containing manganese and magnesium
HENKEL KGAA20 citations81
US5792283AAug 11, 1998
Nickel-free phosphating process
HENKEL KGAA9 citations73
US6197126B1Mar 6, 2001
Nickel-free phosphating process
HENKEL KGAA14 citations72
US5391240AFeb 21, 1995
Process for the passivating post-treatment of phosphatized metal surfaces
HENKEL KGAA14 citations72
US4490185ADec 25, 1984
Phosphating solutions and process
HENKEL KGAA9 citations72
US5312492AMay 17, 1994
Process not using chlorate or nitrite for the production of nickel and manganese containing zinc phosphate films
HENKEL KGAA13 citations71
US6395105B1May 28, 2002
Phosphating process with a metalliferous re-rinsing stage
HENKEL KGAA2 citations62
COLLARDIN GMBH GERHARD
3 patentsUS4968360ANov 6, 1990
Process for desludging phosphating baths and device for carrying out said process
COLLARDIN GMBH GERHARD13 citations72
US4384900AMay 24, 1983
Method of treating metal surfaces prior to phosphatization
COLLARDIN GMBH GERHARD11 citations69
US4762572AAug 9, 1988
Process for phosphating electrolytically zinc-coated metals
COLLARDIN GMBH GERHARD10 citations66