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For the Inventor, By the Inventor

Frankfurt, Germany

Chemetall Gmbh


USPTO Granted Patents = 175

% Expired Patents = 28.0



Trademarks = 28

Forward Citations = 495

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211 inventors (with patents filed for the assignee):

goldMedal Ulrich Wietelmann (37 out of 73 patents)

silverMedal Thomas Kolberg (22 out of 29 patents)

bronzeMedal Manfred Walter (20 out of 20 patents)

4.  Uwe Lischka (18 out of 26 patents)

5.  Toshio Inbe (14 out of 28 patents)

6.  Ute Emmel (12 out of 28 patents)

7.  Martin Droll (11 out of 11 patents)

8.  Wolfgang Bremser (10 out of 13 patents)

9.  Oliver Seewald (10 out of 11 patents)

10.  Michael Schwamb (10 out of 10 patents)

11.  Daniel Wasserfallen (10 out of 10 patents)

12.  Aliaksandr Frenkel (10 out of 10 patents)

13.  Vera Sotke (10 out of 10 patents)

14.  Ron Eilinghoff (9 out of 9 patents)

15.  Lars Schachtsiek (8 out of 8 patents)


Core Competencies:
Phosphating
Corrosion Protection
Coating Methods
Surface Treatment
Aluminum
Steel
Polymeric Coatings
Pickling
Sealing Compounds
Metal Pretreatment
Aqueous Compositions
Chemical Conversion

175 patents:

1. 12680048 - One-step pretreatment method of metallic substrates for metal cold forming (2026-07-14),
2. 12584229 - Method for applying a conversion coating with an aquous pickling composition comprising an aminophosphonic acid and a polymer (2026-03-24),
3. 12492322 - Polyurea coating systems as sealants for the exterior of fuel tanks (2025-12-09),
4. 12460304 - Phosphate-free cleaner for metallic surfaces with reduced pickling erosion (2025-11-04),
5. 12428567 - Method for purging paint circuits and waterborne purge cleaner (2025-09-30),
6. 12338850 - Device and method for filling seal caps (2025-06-24),
7. 12312693 - Method for treating surfaces of aluminum containing substrates (2025-05-27),
8. 12203173 - Alternative composition and alternative method for effectively phosphating metal surfaces (2025-01-21),
9. 12195575 - Compositions and methods for metal pre-treatment (2025-01-14),
10. 12139690 - Simplified method for pretreating metal substrates for cold forming and reactive lubricant therefor (2024-11-12),
11. 12060160 - Plastic caps filled with sealing compound as combined protection against fuel and hydraulic fluid and against lightning strikes (2024-08-13),
12. 12043753 - Process for corrosion-protecting pretreatment of a metallic surface containing steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy (2024-07-23),
13. 12023709 - Method of applying a sulphur-containing sealing compound, apparatus therefor, correspondingly treated aerospace vehicle and use thereof (2024-07-02),
14. 12006445 - Anti-rust composition for metal surface and a method of anti-rust treatment on metal surface (2024-06-11),
15. 11958989 - Method for treating surfaces of aluminum containing substrates (2024-04-16),
Chemetall GmbH, headquartered in Frankfurt, Germany, specializes in advanced metal surface treatment solutions. The company focuses on technologies such as phosphating, corrosion protection, and various coating methods tailored for aluminum, steel, and polymeric surfaces. With a commitment to enhancing surface performance, Chemetall develops innovative processes that improve durability and longevity of metal components across diverse industries, including automotive and manufacturing. Their expertise in pickling and surface treatment positions them as a leader in the field.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

Chemetall Gmbh
175 Patents

#17 in Frankfurt

#344 in Germany

#4,747 in the World

Frankfurt, DE
Frankfurt, Germany

Chemetall Gmbh

Forward Citations = 495

211 inventors:

goldMedal Ulrich Wietelmann (37 out of 73 patents)

silverMedal Thomas Kolberg (22 out of 29 patents)

bronzeMedal Manfred Walter (20 out of 20 patents)

4.  Uwe Lischka (18 out of 26 patents)

5.  Toshio Inbe (14 out of 28 patents)

Please report any incorrect information to [email protected]
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