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For the Inventor, By the Inventor

Frankfurt, Germany

Cassella Aktiengesellschaft


USPTO Granted Patents = 260

Trademarks = 4

Forward Citations = 1,710

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249 inventors (with patents filed for the assignee):

goldMedal Ulrich Buhler (41 out of 57 patents)

silverMedal Friedrich Engelhardt (37 out of 57 patents)

bronzeMedal 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
Hydrogels
Dyes
Polycondensates
Swellable Polymers
Amino Acid Derivatives
Aromatic Compounds
Dyeing Processes
Crosslinkers
Textile Treatments
Sulphur Dyes
Hydrocarbon Gels

260 patents:

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, headquartered in Frankfurt, Germany, specializes in the development and manufacturing of hydrophilic polymers and related materials. The company focuses on innovative solutions in hydrogels, swellable polymers, and amino acid derivatives, catering to various industries including textiles and pharmaceuticals. With expertise in dyeing processes and aromatic compounds, Cassella is committed to advancing polymer technology, enhancing product performance, and meeting the evolving needs of its global clientele.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Cassella Aktiengesellschaft
260 Patents

#14 in Frankfurt

#222 in Germany

#3,363 in the World

Frankfurt, DE
Frankfurt, Germany

Cassella Aktiengesellschaft

Forward Citations = 1,710

249 inventors:

goldMedal Ulrich Buhler (41 out of 57 patents)

silverMedal Friedrich Engelhardt (37 out of 57 patents)

bronzeMedal Karl Schonafinger (33 out of 41 patents)

4.  Rudi Beyerle (31 out of 33 patents)

5.  Wolfgang Bauer (27 out of 46 patents)

Please report any incorrect information to [email protected]
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