Company Filing History:

11 out of 6,662

Hoechst Aktiengesellschaft

patents

1 out of 260

Cassella Aktiengesellschaft

Years Active: 1983-2000

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6090928 - Process for the preparation and work-up of N-hydroxyalkylchitosans (2000-07-18),

2. 5747468 - Cationic unsaturated saccharides and polymers prepared therefrom, and (1998-05-05),

3. 5500124 - Process for the purifying working-up of reaction media and/or wash media (1996-03-19),

4. 5442048 - Process for the preparation of activated chitosans and their use in the (1995-08-15),

5. 5395930 - Alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl substituents (1995-03-07),

6. 5372642 - Use of carboxymethylated methyl hydroxyethyl cellulose ethers or methyl (1994-12-13),

7. 5302196 - Modified cellulose ethers and the use thereof in dispersion paints (1994-04-12),

8. 4979681 - Process for grinding and simultaneous drying of moist cellulose ether (1990-12-25),

9. 4794166 - Process for the preparation of a hydrogel which is largely free from (1988-12-27),

10. 4530747 - Photopolymerizable mixture and photopolymerizable copying material (1985-07-23),

11. 4458006 - Photopolymerizable mixture and photopolymerizable copying material (1984-07-03),

12. 4371607 - 4-Halogeno-5-(halogenomethyl-phenyl)-oxazole derivatives, a process for (1983-02-01),

13. 4371606 - 2-(Halogenomethyl-phenyl)-4-halogeno-oxaxole derivatives, a process for (1983-02-01),

Title: Reinhard Donges: Innovator in Chitosan Chemistry

Introduction

Reinhard Donges is a notable inventor based in Bad Soden, Germany. He has made significant contributions to the field of chemistry, particularly in the development of innovative processes involving chitosan derivatives. With a total of 13 patents to his name, Donges has established himself as a key figure in his area of expertise.

Latest Patents

One of his latest patents is titled "Process for the preparation and work-up of N-hydroxyalkylchitosans." This invention relates to a method for preparing and processing N-hydroxyalkylchitosans that are soluble in aqueous media. The process involves the use of cationic unsaturated saccharides and polymers derived from them. Additionally, he has worked on cationic unsaturated saccharides of a specific formula, further advancing the applications of chitosan in various fields.

Career Highlights

Throughout his career, Reinhard Donges has been associated with prominent companies such as Hoechst Aktiengesellschaft and Cassella Aktiengesellschaft. His work in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in chemical processes and materials.

Collaborations

Donges has collaborated with notable colleagues, including Klaus Horn and Manfred Ziegelmayer. These partnerships have fostered a creative environment that has led to the successful development of his patented technologies.

Conclusion

Reinhard Donges is a distinguished inventor whose work in chitosan chemistry has resulted in numerous patents and significant advancements in the field. His innovative processes continue to influence the industry and inspire future research.

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