Inventor
Walter Puschel
Inventor
Leverkusen, DE
Overview
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Cprimary
G03CPhotosensitive materials for photographic purposes41%
C07DHeterocyclic compounds23%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments13%
C07CAcyclic or carbocyclic compounds8%
PatentTitleYear
4,322,492'Process for the development of color photographic images with p-dialkylaminoaniline color developers'19824,301,243'Photographic recording material'19814,250,252'Light-sensitive color photographic material'19814,242,435'Photographic dye diffusion transfer process'19804,198,235'Dye diffusion transfer process employing compounds that release sulfonamide dye providing radicals'19804,195,992'Photographic dye diffusion transfer process'19804,186,012'Light sensitive color photographic material containing development inhibitor releasing coupler'19804,171,223'Light-sensitive color photographic material'19794,171,220'Photographic dye diffusion transfer process'19794,156,608'Color photographic material with improved color reproduction'19794,139,387'Process for the production of direct-positive photographic images'19794,139,383'Dye diffusion transfer employing pyridine azo dye'19794,110,113'Sulfonamido dye releaser in photographic dye diffusion transfer'19784,088,491'Light sensitive photographic material'19784,046,574'Color photographic material with homophthalimide thioether development inhibitor'19774,000,156'Preparation of 4-methyl-2-pyrazolin-5-ones'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976Patents assigned to AGFA GEVAERT NV (1)· patent assignee history
1976–1982Based in Leverkusen, DE· patent location history
1977–1982Patents assigned to AGFA GEVAERT AG (15)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| AGFA GEVAERT AG | 15 | 1977–1982 |
| AGFA GEVAERT NV | 1 | 1976 |
Locations
| Location | Patents | Span |
|---|---|---|
| Leverkusen, DE | 16 | 1976–1982 |