Inventor

Udo Eckstein

Inventor

Cologne, DE

Overview

23→

Patents

1979–2002

Patent span

Chemistry

Primary field (CPC C)

Patents· 23 as inventor

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

C07Dprimary

C07DHeterocyclic compounds27%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments17%

B41MPrinting, duplicating, marking, or copying processes15%

D21HPulp compositions10%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium7%

C07CAcyclic or carbocyclic compounds5%

D06LDry-cleaning, washing or bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods5%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light5%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds2%

C11DDetergent compositions2%

PatentTitleYear

6,387,296'Optically brightened plastics for optically brightening paper-coating compounds and paper-coating compounds optically brightened in this manner'2002 6,339,117'Whitened polymers and the use thereof in coating slips for coating substrates'2002 6,248,887'Process for preparing bis-alkoxy-triazinyl-amino-containing stilbene disulphonic acids or their derivatives'2001 6,121,444'Process for preparing substituted 4,4\'-diaminostilbene-2,2\'-disulphonic acid salts'2000 6,025,490'Process for the preparation of substituted 4,4\'-diaminostilbene-2,2\'-disulphonic acids'2000 5,233,048'Triarylmethane color formers'1993 5,189,188'Bis(triarylmethane) compounds'1993 5,097,034'Triarylmethane color formers'1992 5,094,688'Triarylmethane color-forming agents'1992 4,923,641'Highly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materials'1990 4,897,223'Tri-phenyl methyl color-forming agents'1990 4,888,128'Paper-coating slips containing fluorescent brighteners'1989 4,812,569'Chromogenic phthalides'1989 4,783,196'Highly concentrated stable solutions of color-forming agents: for pressure-sensitive recording materials'1988 4,670,882'Dyestuff laser'1987 4,610,807'Distyryl compounds'1986 4,563,532'Process for the preparation of .DELTA..sup.4 -1,3,4-oxadiazolin-2-one compounds'1986 4,510,311'Water-insoluble azolystyryl optical brighteners'1985 4,326,066'Triazolyl coumarin compounds, processes for their preparation and their use as whiteners and laser dyestuffs'1982 4,317,782'Distyryl compounds'1982 4,184,977'Fluorescent dyestuffs'1980 4,166,176'Fluorescent dyestuffs'1979 4,140,852'Triazinyl styryl-benzoxazole fluorescent dyestuffs'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–2002Patents assigned to BAYER AG (23)· patent assignee history

1979–1993Based in Cologne, DE· patent location history

1988Based in Koeln, DE· patent location history

2000–2001Based in Koln, DE· patent location history

2002Based in Kln, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAYER AG	23	1979–2002

Locations

Location	Patents	Span
Cologne, DE	17	1979–1993
Koln, DE	3	2000–2001
Kln, DE	2	2002
Koeln, DE	1	1988