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Leverkusen, Germany

Klaus Leverenz

USPTO Granted Patents = 18

Average Co-Inventor Count = 1.6

ph-index = 7

Forward Citations = 113(Granted Patents)

Company Filing History:

18 out of 12,157

Bayer Aktiengesellschaft

Years Active: 1976-1993

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18 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5208325 - Cationic 1,3,4-thiadiazole dyestuffs (1993-05-04),

2. 5102994 - Disperse azo dyestuffs containing a thiocyonate group (1992-04-07),

3. 4835261 - Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy (1989-05-30),

4. 4810783 - Process for the preparation of azo dyestuffs having an aniline-type (1989-03-07),

5. 4773915 - Benzisothiazole azo dye for synthetic fibers (1988-09-27),

6. 4722737 - Stable gamma-modification of a benzisothiazole azo dyestuff (1988-02-02),

7. 4681932 - Benzoisothiazole azo dyestuffs (1987-07-21),

8. 4424156 - Halo-substituted amino-and substituted-sulphonamido-containing azo (1984-01-03),

9. 4329283 - Hydroxypyridone azo dyestuffs (1982-05-11),

10. 4250089 - Process for diazotizing aromatic amines (1981-02-10),

11. 4237048 - Monoazo dyestuff containing di-cyano substituents ortho to the azo group (1980-12-02),

12. 4105655 - Phenyl-azo-anilino dyestuff (1978-08-08),

13. 4083846 - Process for the preparation of azo dyestuffs (1978-04-11),

14. 4083844 - Phenylazo orthocyano phenylazo or orthocyano phenylazo phenylazo (1978-04-11),

15. 3978040 - Process for the preparation of cyanoazo compounds by reacting (1976-08-31),

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