Inventor

Ortwin Schaffer

Inventor

Ludwigshafen, DE

Overview

19→

Patents

1982–1998

Patent span

Chemistry

Primary field (CPC C)

Patents· 19 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C14Cprimary

C14CChemical treatment of hides, skins or leather, e.g. tanning, impregnating, finishing30%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments23%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds17%

D06PDyeing or printing textiles10%

C07CAcyclic or carbocyclic compounds7%

C07DHeterocyclic compounds7%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

PatentTitleYear

5,789,557'Reactive azo dyes with a coupler of the aminonaphthalene series'1998 5,510,468'Amino benzophenone dye'1996 5,380,859'Pyridone compounds and the preparation of disulfonated pyridone compounds'1995 5,372,609'Self-tanning, pretanning and assist tanning of pelts and skin pelts and retanning of leather and skin'1994 5,342,916'Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders'1994 5,320,647'Fluent polyazo dye preparations and method of dying leather or wool therewith'1994 5,286,263'Use of copolymers based on long-chain alkyl vinyl ethers and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent'1994 5,279,613'Copolymers based on long-chain olefins and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent'1994 5,224,963'Quaternized condensation products for aftertreating dyed leather'1993 5,155,164'Products of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehyde'1992 5,124,181'Copolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellent'1992 5,104,979'Polyazo dyes with diazo components of the aminophenol and the amino diphenyl-sulfide, -sulfoxide or -sulfone series'1992 4,983,185'Dyeing of leather with pigments'1991 4,936,864'Condensates of bis-(4-hydroxyphenyl) sulfone as tanning assistants, their preparation and use in the tanning of leather'1990 4,888,412'Tanning assistant'1989 4,801,693'Substituted sulfobenzene and triazine-containing reactive dyes'1989 4,729,768'Deliming of hides and use of cyclic esters of sulfurous acid as deliming agents'1988 4,677,199'Reactive dyes containing substituted 4-fluoropyridaz-6-one radicals'1987 4,351,640'Dye powder formulation'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982Patents assigned to HERRMANN MANFRED (1)· patent assignee history

1982Patents assigned to SCHAFFER ORTWIN (1)· patent assignee history

1982–1998Based in Ludwigshafen, DE· patent location history

1987–1998Patents assigned to BASF AG (18)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	18	1987–1998
HERRMANN MANFRED	1	1982
SCHAFFER ORTWINself	1	1982

Locations

Location	Patents	Span
Ludwigshafen, DE	19	1982–1998