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For the Inventor, By the Inventor

Trostberg, Germany

Alzchem Ag


USPTO Granted Patents = 16

% Expired Patents = 68.8


Trademarks = 14

Forward Citations = 14

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17 inventors (with patents filed for the assignee):

goldMedal Hans-Peter Krimmer (10 out of 36 patents)

silverMedal Martin Ebner (8 out of 8 patents)

bronzeMedal Sylvia Strobel (6 out of 6 patents)

4.  Christian Gerhart (5 out of 5 patents)

5.  Monika Brandl (5 out of 5 patents)

6.  Plamen Toshev (3 out of 6 patents)

7.  Thomas Sattelmayer (3 out of 34 patents)

8.  Henning Middelmann (2 out of 2 patents)

9.  Florian Ritzinger (2 out of 3 patents)

10.  Martin G Hitzler (2 out of 8 patents)

11.  Frank Eißmann (1 out of 1 patent)

12.  Doris Krammer (1 out of 1 patent)

13.  Torsten Eichhorn (1 out of 1 patent)

14.  Claudia Winkler (1 out of 1 patent)

15.  Michaela Huber (1 out of 1 patent)


16 patents:

1. 10526355 - Hardener and cure accelerant with flame retardancy effect for curing epoxy resins (II) (2020-01-07),
2. 9878288 - Ammonia gas generator, method for producing ammonia and use of the same for reducing nitrogen oxides in exhaust gases (2018-01-30),
3. 9731976 - Method for the production of ammonia from an ammonia precursor substance in order to reduce nitrogen oxides in exhaust gases (2017-08-15),
4. 9687783 - Ammonia gas generator and use of the same for reducing nitrogen oxides in exhaust gases (2017-06-27),
5. 9663609 - Use of N,N'-(dimethyl) urones and method for curing epoxy resin compositions (2017-05-30),
6. 9617369 - High-latency hardeners for epoxy resins (2017-04-11),
7. 9499684 - Alkyl or dialkyl-semicarbazone as a hardener for epoxy resin (2016-11-22),
8. 9499659 - Liquid hardeners for hardening epoxide resins (I) (2016-11-22),
9. 9499653 - Curing agents for epoxy resins (2016-11-22),
10. 9403976 - Semicarbazones as accelerators for curing epoxy resins (2016-08-02),
11. 9382374 - Liquid hardeners for hardening epoxide resins (II) (2016-07-05),
12. 9371240 - Ammonia gas generator for producing ammonia in order to reduce nitrogen oxides in exhaust gases (2016-06-21),
13. 9315391 - Ammonia gas generator and method for producing ammonia in order to reduce nitrogen oxides in exhaust gases (2016-04-19),
14. 9296855 - High-latency hardeners for epoxy resins (2016-03-29),
15. 9238706 - Use of guanidine derivatives as curing accelerators for epoxy resins (2016-01-19),
Company Overview
Alzchem AG is a leading chemical company based in Trostberg, Germany, specializing in the production of high-quality chemical products and solutions. The company focuses on various sectors, including specialty chemicals, fertilizers, and pharmaceuticals, leveraging advanced research and development capabilities. Alzchem is committed to innovation and sustainability, providing tailored solutions to meet the diverse needs of its global clientele while maintaining a strong emphasis on environmental responsibility.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

16 Patents

#4 in Trostberg

#2,625 in Germany

#37,831 in the World

Trostberg, DE
Trostberg, Germany

Alzchem Ag

Forward Citations = 14

17 inventors:

goldMedal Hans-Peter Krimmer (10 out of 36 patents)

silverMedal Martin Ebner (8 out of 8 patents)

bronzeMedal Sylvia Strobel (6 out of 6 patents)

4.  Christian Gerhart (5 out of 5 patents)

5.  Monika Brandl (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Alzchem Ag. Retrieved from https://idiyas.com/company/alzchem-ag

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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