Inventor

Rudolf Stolzenburg

Inventor

Langenfeld, DE

Overview

1979–1991

Patent span

Chemistry

Primary field (CPC C)

Patents· 10 as inventor

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

G03Cprimary

G03CPhotosensitive materials for photographic purposes43%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments35%

C07DHeterocyclic compounds13%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%

PatentTitleYear

5,021,330'Color photographic recording material containing a coupler releasing a photographically active compound'1991 4,870,000'Color photograhic recording material containing a coupler which releases a photographically active compound'1989 4,767,698'Photographic material containing a pyridine azo or pyridazine azo cyan dye releasing compound'1988 4,579,805'Color photographic recording material containing a thiophene azo dye releaser for cyan dyes'1986 4,559,296'Photographic recording material containing new azo dyes'1985 4,524,124'Color photographic recording material containing a thiazole azo dye releaser for cyan dyes'1985 4,521,506'Monoazo pyridinol dyes chelated or capable of being chelated with metal ions and their use for image production'1985 4,393,132'Photographic recording material with arylazocyanoacetic ester dye releasers'1983 4,195,992'Photographic dye diffusion transfer process'1980 4,139,383'Dye diffusion transfer employing pyridine azo dye'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1991Patents assigned to AGFA GEVAERT AG (10)· patent assignee history

1979Based in Dusseldorf, DE· patent location history

1980–1983Based in Duesseldorf, DE· patent location history

1985–1991Based in Langenfeld, DE· patent location history

1985Based in Langenfold, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AGFA GEVAERT AG	10	1979–1991

Locations

Location	Patents	Span
Langenfeld, DE	6	1985–1991
Duesseldorf, DE	2	1980–1983
Langenfold, DE	1	1985
Dusseldorf, DE	1	1979