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Leverkusen, Germany

Kronos International, Inc.

USPTO Granted Patents = 39

EPO Patents = 28

Trademarks = 7

Forward Citations = 85

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55 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. Volker Juergens (5 out of 5 patents)

5. Rainer Gruber (5 out of 5 patents)

6. Volker Jürgens (5 out of 5 patents)

7. Frank Mersch (4 out of 6 patents)

8. Joerg Friedrich (3 out of 3 patents)

9. Heiko Frahm (3 out of 3 patents)

10. Alexander Breyder (3 out of 3 patents)

11. Siegfried Blümel (3 out of 4 patents)

12. Uwe Wilkenhoener (2 out of 6 patents)

13. Norbert Beyer (2 out of 2 patents)

14. Janine Siekman (2 out of 2 patents)

15. Nicole Kolmer-Anderl (2 out of 3 patents)

39 patents: Sort by Forward Citations

1. 12435228 - Printing ink containing undried, coated titanium dioxide (2025-10-07),

2. 11623993 - Laminate pigment with spacing properties and high UV-greying stability (2023-04-11),

3. 11208260 - Bag for powdery bulk materials (2021-12-28),

4. 10533102 - Preparation of matt paints and printing inks (2020-01-14),

5. 10487214 - Method for coating the surface of a substrate (2019-11-26),

6. 10392526 - Matting agent and method for obtaining the same (2019-08-27),

7. 10351439 - Production of nanoparticulate titanium dioxide (2019-07-16),

8. 10160862 - Production of titanium dioxide pigment obtainable by the sulfate process with a narrow particle size distribution (2018-12-25),

9. 9962732 - Method for coating the surface of inorganic particles with silicon dioxide and at least one further inorganic compound (2018-05-08),

10. 9920182 - Method for manufacturing composite particles (2018-03-20),

11. 9909011 - Method for coating the surface of inorganic solid particles, especially titanium dioxide pigment particles (2018-03-06),

12. 9738542 - Method for the further processing of iron sulfate heptahydrate (2017-08-22),

13. 9637640 - Method for coating the surface of inorganic particles, particularly titanium dioxide pigment particles (2017-05-02),

14. 9539560 - Method for manufacturing a photocatalyst based on titanium dioxide containing carbon or metal (2017-01-10),

15. 9498760 - Stable nanoparticulate suspension and method for production (2016-11-22),

Kronos International, Inc. is a global leader in the production and marketing of titanium dioxide pigments, which are used in a wide variety of applications including paints, plastics, and paper. With over 100 years of experience, Kronos has established a strong reputation for delivering high-quality products and innovative solutions to its customers worldwide. The company operates multiple production facilities and maintains a diverse customer base in over 100 countries. Kronos is committed to sustainability and responsible business practices, continuously investing in research and development to reduce its environmental footprint and improve product performance.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

39 Patents

#11 in Leverkusen

#1,324 in Germany

#16,935 in the World

Leverkusen, Germany

Kronos International, Inc.

Forward Citations = 85

55 inventors:

Siegfried Bluemel (11 out of 11 patents)

Lydia Drews-Nicolai (9 out of 9 patents)

Volker Schmitt (8 out of 9 patents)

4. Volker Juergens (5 out of 5 patents)

5. Rainer Gruber (5 out of 5 patents)

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