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For the Inventor, By the Inventor

Kassel, Germany

K+s Aktiengesellschaft


USPTO Granted Patents = 13

% Expired Patents = 38.5



Trademarks = 1

Forward Citations = 13

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33 inventors (with patents filed for the assignee):

goldMedal Guido Baucke (6 out of 7 patents)

silverMedal Armin Dietrich (6 out of 7 patents)

bronzeMedal Ludger Waldmann (6 out of 8 patents)

4.  Stefan Dressel (5 out of 5 patents)

5.  Wolfgang Walczyk (4 out of 5 patents)

6.  Sebastian Kopf (3 out of 3 patents)

7.  Paul Meissner (3 out of 3 patents)

8.  Jochen Brod (2 out of 2 patents)

9.  Ingo Stahl (2 out of 10 patents)

10.  David Scherr (1 out of 1 patent)

11.  Torsten Rest (1 out of 2 patents)

12.  Michael Krueger (1 out of 3 patents)

13.  Uwe Wachsmuth (1 out of 1 patent)

14.  Stefan Thenert (1 out of 1 patent)

15.  Ulrich Kleine-Kleffmann (1 out of 7 patents)


13 patents:

1. 12709546 - METHOD FOR PRODUCING SULPHUR-CONTAINING POTASH GRANULES (2026-08-18),
2. 11814298 - Method for producing potassium chloride granular materials (2023-11-14),
3. 11814297 - Method for producing potassium chloride granular material (2023-11-14),
4. 11795060 - Process for producing potassium chloride granulates (2023-10-24),
5. 10723632 - Magnesium sulfate granulates based on synthetic magnesium sulphate (2020-07-28),
6. 10118183 - Process for the selective floatation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent (2018-11-06),
7. 9994491 - Composition of a magnesium sulphate-urea compound (2018-06-12),
8. 9752014 - Process for the manufacture of nano-scale, primary, coated hydrotalcite and hydrotalcite (2017-09-05),
9. 9625391 - LIBS measurement tube (2017-04-18),
10. 9393572 - Electrostatic separation of a mixture of valuable materials, e.g., a mineral salt mixture, by means of a pipe separator, and device for electrostatically separating such a mixture of valuable materials by means of a pipe separator, and method for electrostatic separation (2016-07-19),
11. 7635822 - Method for treating ground crude potassium salts that contain kieserite (2009-12-22),
12. 7553462 - [object Object] (2009-06-30),
13. 7534586 - Method for producing biomass (2009-05-19),
Company Overview
K+S Aktiengesellschaft is a leading global provider of fertilizers and salt products, specializing in the development and production of potash and magnesium products for agriculture. The company focuses on enhancing crop yields and soil health through innovative solutions tailored to the needs of farmers. Additionally, K+S is involved in the extraction and processing of salt, serving various industries including food, chemical, and de-icing applications. Headquartered in Kassel, Germany, K+S operates with a commitment to sustainability and responsible resource management.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

13 Patents

#12 in Kassel

#3,083 in Germany

#45,039 in the World

Kassel, DE
Kassel, Germany

K+s Aktiengesellschaft

Forward Citations = 13

33 inventors:

goldMedal Guido Baucke (6 out of 7 patents)

silverMedal Armin Dietrich (6 out of 7 patents)

bronzeMedal Ludger Waldmann (6 out of 8 patents)

4.  Stefan Dressel (5 out of 5 patents)

5.  Wolfgang Walczyk (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: K+s Aktiengesellschaft. Retrieved from https://idiyas.com/company/k-plus-s-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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