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Dudingen, Switzerland

Paul Tschopp

USPTO Granted Patents = 15

Average Co-Inventor Count = 1.8

ph-index = 5

Forward Citations = 92(Granted Patents)

Location History:

Marly-le-Petit, CH (1976)
Marly, CH (1976 - 1978)
Dudingen, CH (1978 - 1988)

Company Filing History:

Years Active: 1976-1988

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4743683 - Imidazole azo dyes (1988-05-10),

2. 4732997 - Dibenzoxaphosphorin compounds (1988-03-22),

3. 4661440 - Process for stabilizing photographic material containing magenta coupler (1987-04-28),

4. 4661437 - Photographic material with heterocylic azo dye for the silver dye bleach (1987-04-28),

5. 4324898 - Heterocyclic compounds useful as color photographic material (1982-04-13),

6. 4268592 - Material for color photography (1981-05-19),

7. 4268591 - Material for color photography (1981-05-19),

8. 4229577 - Yellow photographic color couplers containing (1980-10-21),

9. 4206278 - Color photographic material (1980-06-03),

10. 4118232 - Photographic material containing sulphonic acid group containing disazo (1978-10-03),

11. 4115121 - Silver halide color photographic material containing yellow coupler (1978-09-19),

12. 4051123 - Sulfonic-acid-group containing disazo dyestuffs (1977-09-27),

13. 4026709 - Color photographic recording material (1977-05-31),

14. 3984432 - Color photographic recording material (1976-10-05),

15. 3931142 - Heterocyclic containing disazo compounds (1976-01-06),

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