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Frankfurt-am-Main, Germany

Cassella Aktiengesellschaft

USPTO Granted Patents = 260

Trademarks = 4

Forward Citations = 1,694

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249 inventors (with patents filed for the assignee):

Ulrich Buhler (41 out of 57 patents)

Friedrich Engelhardt (37 out of 57 patents)

Karl Schonafinger (33 out of 41 patents)

4. Rudi Beyerle (31 out of 33 patents)

5. Wolfgang Bauer (27 out of 46 patents)

6. Joachim Ribka (27 out of 64 patents)

7. Helmut Bohn (26 out of 30 patents)

8. Horst Tappe (24 out of 31 patents)

9. Ulrich Riegel (20 out of 63 patents)

10. Piero A Martorana (20 out of 21 patents)

11. Karl-Heinz Keil (18 out of 29 patents)

12. Rolf-Eberhard Nitz (18 out of 19 patents)

13. Melitta Just (17 out of 33 patents)

14. Steffen Piesch (17 out of 17 patents)

15. Fritz Engelhardt (16 out of 35 patents)

Core Competencies:

Hydrophilic Polymers

Swellable Hydrogels

Coumarin Derivatives

Polycondensates

Hydroxymethylfurazancarboxylic Acid

Monoazo Dyes

Phenylimidazolidine Derivatives

Sulphur Dyes

Pyrimidofuroxans

Triazine Resins

Aryl Sulphides

Hydrocarbon Extraction

260 patents: Sort by Forward Citations

1. 6300423 - Process for modifying hydrophilic polymers (2001-10-09),

2. 5681878 - Low-dusting pulverulent hydrophilic polymers (1997-10-28),

3. 5679704 - Use of 2- (N-(2-aminoethyl)amino) acetic acid derivatives (1997-10-21),

4. 5668236 - Hydrophilic highly swellable hydrogels (1997-09-16),

5. 5594083 - Water-swellable hydrophilic polymers (1997-01-14),

6. 5571764 - Absorbent for water and aqueous solutions (1996-11-05),

7. 5554611 - Use of coumarin derivatives (1996-09-10),

8. 5530093 - Polycondensates containing phosphinic and phosphonic acid groups (1996-06-25),

9. 5514806 - Method of preparing 1-amino-2, 6-dimethylpiperidine (1996-05-07),

10. 5510489 - Method of preparing 1-amino-2, 6-dimethylpiperidine (1996-04-23),

11. 5508467 - Process for the preparation of hydroxyalkylaminonitrobenzene derivatives (1996-04-16),

12. 5502231 - Process for the preparation of cyclic vinylphosphonic esters (1996-03-26),

13. 5500436 - 2-(N-(2-aminomethyl)amino)acetic acid derivatives to inhibit advanced (1996-03-19),

14. 5489647 - Hydrophilic, swellable graft polymers (1996-02-06),

15. 5488123 - Polycondensates containing polysiloxane groups (1996-01-30),

Cassella Aktiengesellschaft is a German chemical company specializing in the manufacture of industrial chemicals. With a history dating back to 1799, Cassella has developed into a global leader in various chemical sectors, including pharmaceuticals, textiles, and coatings. Their innovative products and solutions cater to a wide range of industries, enabling clients to enhance their processes and achieve sustainable development.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

260 Patents

#11 in Frankfurt-am-Main

#251 in Germany

#3,252 in the World

Frankfurt-am-Main, Germany

Cassella Aktiengesellschaft

Forward Citations = 1,694

249 inventors:

Ulrich Buhler (41 out of 57 patents)

Friedrich Engelhardt (37 out of 57 patents)

Karl Schonafinger (33 out of 41 patents)

4. Rudi Beyerle (31 out of 33 patents)

5. Wolfgang Bauer (27 out of 46 patents)

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