Inventor · disambiguated record
Karl-Heinz Gottwald
Also filed as: GOTTWALD KARL-HEINZ
11 granted patents·135 citations·filing 1980–2000
91Inventor score
Technology areasC23C
Top patents by PatentIndex Score
11 records- 0161US6090224APhosphating process with a copper-containing re-rinsing stageHENKEL KGAA·Filed 1996·Granted Jul 18, 2000·20 cites·6 claims
- 0258US5207840AProcess for preparing zinc phosphate coatings containing manganese and magnesiumHENKEL KGAA·Filed 1990·Granted May 4, 1993·20 cites·20 claims
- 0356US6395105B1Phosphating process with a metalliferous re-rinsing stageHENKEL KGAA·Filed 2000·Granted May 28, 2002·2 cites·20 claims
- 0450US6197126B1Nickel-free phosphating processHENKEL KGAA·Filed 1992·Granted Mar 6, 2001·14 cites·18 claims
- 0550US5391240AProcess for the passivating post-treatment of phosphatized metal surfacesHENKEL KGAA·Filed 1991·Granted Feb 21, 1995·14 cites·20 claims
- 0648US4968360AProcess for desludging phosphating baths and device for carrying out said processCOLLARDIN GMBH GERHARD·Filed 1988·Granted Nov 6, 1990·13 cites·13 claims
- 0747US5312492AProcess not using chlorate or nitrite for the production of nickel and manganese containing zinc phosphate filmsHENKEL KGAA·Filed 1990·Granted May 17, 1994·13 cites·6 claims
- 0847US4384900AMethod of treating metal surfaces prior to phosphatizationCOLLARDIN GMBH GERHARD·Filed 1980·Granted May 24, 1983·11 cites·10 claims
- 0946US4490185APhosphating solutions and processHENKEL KGAA·Filed 1983·Granted Dec 25, 1984·9 cites·20 claims
- 1043US5792283ANickel-free phosphating processHENKEL KGAA·Filed 1994·Granted Aug 11, 1998·9 cites·24 claims
- 1138US4762572AProcess for phosphating electrolytically zinc-coated metalsCOLLARDIN GMBH GERHARD·Filed 1986·Granted Aug 9, 1988·10 cites·29 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →