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Leverkusen, Germany

Kronos International, Inc.

USPTO Granted Patents = 43

% Expired Patents = 37.2

EPO Patents = 28

Trademarks = 7

Forward Citations = 88

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58 inventors (with patents filed for the assignee):

Siegfried Bluemel (11 out of 11 patents)

Lydia Drews-Nicolai (9 out of 9 patents)

Volker Schmitt (8 out of 9 patents)

4. Frank Mersch (5 out of 7 patents)

5. Volker Juergens (5 out of 5 patents)

6. Rainer Gruber (5 out of 5 patents)

7. Volker Jürgens (5 out of 5 patents)

8. Mitja Medved (4 out of 5 patents)

9. Thomas Pierau (4 out of 5 patents)

10. Joerg Friedrich (3 out of 3 patents)

11. Heiko Frahm (3 out of 3 patents)

12. Alexander Breyder (3 out of 3 patents)

13. Siegfried Blümel (3 out of 4 patents)

14. Frank Landwehr (2 out of 3 patents)

15. Uwe Wilkenhoener (2 out of 6 patents)

Core Competencies:

Titanium Dioxide

Pigment Manufacturing

Nanoparticulate

Surface Treatment

Photocatalyst

Recycling

Composite Pigments

UV-Greying Stability

Coating Methods

Density Tailoring

Ink Production

Construction Materials

43 patents: Sort by Forward Citations

1. 12759893 - Recovery of chlorine from hydrogen chloride generated in carbochlorination processes (2026-10-13),

2. 12595373 - Titanium dioxide pigment with coloring after-treatment (2026-04-07),

3. 12577124 - Feedstock composite with carbonaceous material having a tailored density (2026-03-17),

4. 12503374 - Recycling of components contained in a residue obtained from the chloride process (2025-12-23),

5. 12435228 - Printing ink containing undried, coated titanium dioxide (2025-10-07),

6. 11623993 - Laminate pigment with spacing properties and high UV-greying stability (2023-04-11),

7. 11208260 - Bag for powdery bulk materials (2021-12-28),

8. 10533102 - Preparation of matt paints and printing inks (2020-01-14),

9. 10487214 - Method for coating the surface of a substrate (2019-11-26),

10. 10392526 - Matting agent and method for obtaining the same (2019-08-27),

11. 10351439 - Production of nanoparticulate titanium dioxide (2019-07-16),

12. 10160862 - Production of titanium dioxide pigment obtainable by the sulfate process with a narrow particle size distribution (2018-12-25),

13. 9962732 - Method for coating the surface of inorganic particles with silicon dioxide and at least one further inorganic compound (2018-05-08),

14. 9920182 - Method for manufacturing composite particles (2018-03-20),

15. 9909011 - Method for coating the surface of inorganic solid particles, especially titanium dioxide pigment particles (2018-03-06),

Company Overview

Kronos International, Inc. is a prominent player in the specialty chemicals sector, focusing on the development and manufacturing of high-performance materials. The company specializes in providing innovative solutions for various industries, including automotive, aerospace, and consumer products. With a strong emphasis on research and technology, Kronos is dedicated to advancing sustainable practices and enhancing product performance through cutting-edge chemical formulations. Headquartered in Leverkusen, Germany, it serves a global market with a commitment to quality and innovation.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

43 Patents

#10 in Leverkusen

#1,202 in Germany

#16,047 in the World

Leverkusen, Germany

Kronos International, Inc.

Forward Citations = 88

58 inventors:

Siegfried Bluemel (11 out of 11 patents)

Lydia Drews-Nicolai (9 out of 9 patents)

Volker Schmitt (8 out of 9 patents)

4. Frank Mersch (5 out of 7 patents)

5. Volker Juergens (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kronos International, Inc.. Retrieved from https://idiyas.com/company/kronos-international

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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