Inventor

Matthias Wiesenfeldt

Inventor

Mutterstadt, DE

Overview

25→

Patents

1991–2000

Patent span

Chemistry

Primary field (CPC C)

Patents· 25 as inventor

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

C09Bprimary

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments38%

C07DHeterocyclic compounds15%

B41MPrinting, duplicating, marking, or copying processes10%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds8%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%

C07CAcyclic or carbocyclic compounds4%

D06PDyeing or printing textiles4%

C14CChemical treatment of hides, skins or leather, e.g. tanning, impregnating, finishing2%

D21HPulp compositions2%

PatentTitleYear

6,080,209'Stable colorant compositions'2000 6,013,775'Polyazo dyes containing a plurality of hydroxy sulfonyl groups'2000 6,011,141'Acid polyazo dyes'2000 5,972,050'Dye mixtures containing polyazo dyes and CI Sulphur Black 1 dye'1999 5,910,623'Mixtures of sulfo-containing 1:2 metal complexes with vinyl polymers'1999 5,654,122'N-aminopyridone dyes'1997 5,621,107'Sulfopyridones and a process of making therefor'1997 RE035407'Azo dye polymers'1996 5,580,980'N-aminopyridone dyes'1996 5,554,737'Doubled acid azo dyes with a hydroxypyridone coupling component'1996 5,461,131'Azo dye polymers'1995 5,449,762'Phenylazo- or naphthylazobenzenes having thioether groups'1995 5,434,231'Azo dye polymers'1995 5,428,140'Preparation of phenylazo- or naphthylazobenzenes having thioether groups'1995 5,391,719'Preparation of aminoformazans'1995 5,298,610'Thiazoleazo dyes having a coupling component of the diphenylamine series'1994 5,264,507'Azo dye polymers'1993 5,260,446'Aminothiazoles'1993 5,206,376'Preparation of 2-amino-5-formyl-4-halothiazoles'1993 5,147,845'Triazolopyridine dyes and thermal transfer of methine dyes'1992 5,145,828'Transfer of azo dyes'1992 5,079,365'Triazolopyridine dyes and thermal transfer of methine dyes'1992 5,064,962'Diaminothiophenes'1991 5,059,684'Azo dyes whose diazo and coupling components stem from the thiazole series'1991 5,003,081'Pyrrole derivatives useful as diazo and coupling components'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2000Patents assigned to BASF AG (25)· patent assignee history

1991–1997Based in Mutterstadt, DE· patent location history

1999–2000Based in Dannstadt-Schauernheim, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	25	1991–2000

Locations

Location	Patents	Span
Mutterstadt, DE	20	1991–1997
Dannstadt-Schauernheim, DE	5	1999–2000