Inventor · disambiguated record
Ortwin Schaffer
Also filed as: SCHAFFER ORTWIN
19 granted patents·205 citations·filing 1980–1995
95Inventor score
Top patents by PatentIndex Score
19 records- 0182US5124181ACopolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellentBASF AG·Filed 1990·Granted Jun 23, 1992·37 cites·9 claims
- 0272US4888412ATanning assistantBASF AG·Filed 1988·Granted Dec 19, 1989·18 cites·4 claims
- 0371US5789557AReactive azo dyes with a coupler of the aminonaphthalene seriesBASF AG·Filed 1995·Granted Aug 4, 1998·15 cites·10 claims
- 0471US5279613ACopolymers based on long-chain olefins and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellentBASF AG·Filed 1992·Granted Jan 18, 1994·21 cites·11 claims
- 0570US5342916ACondensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powdersBASF AG·Filed 1992·Granted Aug 30, 1994·21 cites·7 claims
- 0670US4801693ASubstituted sulfobenzene and triazine-containing reactive dyesBASF AG·Filed 1987·Granted Jan 31, 1989·9 cites·15 claims
- 0766US5380859APyridone compounds and the preparation of disulfonated pyridone compoundsBASF AG·Filed 1992·Granted Jan 10, 1995·8 cites·2 claims
- 0865US4351640ADye powder formulationSCHAFFER ORTWIN·Filed 1980·Granted Sep 28, 1982·8 cites·3 claims
- 0961US5104979APolyazo dyes with diazo components of the aminophenol and the amino diphenyl-sulfide, -sulfoxide or -sulfone seriesBASF AG·Filed 1990·Granted Apr 14, 1992·7 cites·2 claims
- 1059US5510468AAmino benzophenone dyeBASF AG·Filed 1994·Granted Apr 23, 1996·5 cites·24 claims
- 1158US5155164AProducts of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehydeBASF AG·Filed 1991·Granted Oct 13, 1992·12 cites·26 claims
- 1257US5286263AUse of copolymers based on long-chain alkyl vinyl ethers and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellentBASF AG·Filed 1990·Granted Feb 15, 1994·11 cites·6 claims
- 1354US4983185ADyeing of leather with pigmentsBASF AG·Filed 1989·Granted Jan 8, 1991·8 cites·5 claims
- 1452US5372609ASelf-tanning, pretanning and assist tanning of pelts and skin pelts and retanning of leather and skinBASF AG·Filed 1992·Granted Dec 13, 1994·8 cites·6 claims
- 1548US4936864ACondensates of bis-(4-hydroxyphenyl) sulfone as tanning assistants, their preparation and use in the tanning of leatherBASF AG·Filed 1988·Granted Jun 26, 1990·6 cites·8 claims
- 1643US4677199AReactive dyes containing substituted 4-fluoropyridaz-6-one radicalsBASF AG·Filed 1985·Granted Jun 30, 1987·3 cites·3 claims
- 1739US5320647AFluent polyazo dye preparations and method of dying leather or wool therewithBASF AG·Filed 1992·Granted Jun 14, 1994·6 cites·2 claims
- 1832US5224963AQuaternized condensation products for aftertreating dyed leatherBASF AG·Filed 1991·Granted Jul 6, 1993·2 cites·7 claims
- 1929US4729768ADeliming of hides and use of cyclic esters of sulfurous acid as deliming agentsBASF AG·Filed 1986·Granted Mar 8, 1988·0 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Ortwin Schaffer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →