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For the Inventor, By the Inventor

London, United Kingdom

Johnson Matthey Public Limited Company


USPTO Granted Patents = 835



Trademarks = 70

Forward Citations = 6,068

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1,181 inventors (with patents filed for the assignee):

goldMedal Paul Richard Phillips (95 out of 103 patents)

silverMedal Hai-Ying Chen (83 out of 86 patents)

bronzeMedal Joseph Michael Fedeyko (70 out of 72 patents)

4.  Andrew Francis Chiffey (61 out of 65 patents)

5.  Guy Richard Chandler (58 out of 62 patents)

6.  Raj Rao Rajaram (57 out of 59 patents)

7.  Paul Joseph Andersen (37 out of 44 patents)

8.  Francois Moreau (30 out of 35 patents)

9.  Martyn Vincent Twigg (29 out of 35 patents)

10.  Andrew Peter Walker (28 out of 29 patents)

11.  David Thompsett (25 out of 32 patents)

12.  Philip Gerald Blakeman (24 out of 25 patents)

13.  Stuart David Reid (22 out of 22 patents)

14.  John Benjamin Goodwin (22 out of 24 patents)

15.  Jing Lu (22 out of 27 patents)


Core Competencies:
Steam Reforming
Catalyst Supports
Electroplating Solutions
Exhaust Gas Treatment
Copper-containing Catalysts
Particulate Filters
Zoned Oxidation Catalyst
Three-way Catalysis
Transition Metal Catalysts
Ammonia-burning Combustion Engine
Catalytic Wall-flow Filter
Gold-containing Catalyst

835 patents:

1. 12492448 - Methods for the separation and/or purification of metals (2025-12-09),
2. 12459814 - Steam reforming (2025-11-04),
3. 12453963 - Modified catalyst supports and catalysts supported thereon (2025-10-28),
4. 12442099 - Electroplating solutions (2025-10-14),
5. 12427475 - Exhaust gas treatment system for an ammonia-containing exhaust gas (2025-09-30),
6. 12409444 - Method for making copper-containing catalysts (2025-09-09),
7. 12403425 - Exhaust gas treatment system (2025-09-02),
8. 12392277 - Ammonia-burning combustion engine (2025-08-19),
9. 12390795 - Preparation of supported metal nanoparticles using polyamine for three-way catalysis application (2025-08-19),
10. 12383848 - Chromatographic method for separating transition metals (2025-08-12),
11. 12357981 - Particulate filters (2025-07-15),
12. 12357980 - Apparatus and method for coating substrates with washcoats (2025-07-15),
13. 12343714 - Composite, zoned oxidation catalyst for a compression ignition internal combustion engine (2025-07-01),
14. 12343707 - Catalyst article having high local rhodium concentration (2025-07-01),
15. 12343705 - TWC catalysts for gasoline engine exhaust gas treatments (2025-07-01),
Johnson Matthey is a global leader in sustainable technologies, applying cutting-edge science and creating solutions that protect the environment, enhance health, and support society. With over 200 years of experience, Johnson Matthey is a leading supplier of advanced catalysts, battery materials, and other sustainable technologies to industries worldwide. They work closely with customers to develop tailored solutions that address complex challenges and enable sustainable growth.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 9 2025

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835 Patents

#5 in London

#15 in United Kingdom

#1,169 in the World

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London, United Kingdom

Johnson Matthey Public Limited Company

Forward Citations = 6,068

1,181 inventors:

goldMedal Paul Richard Phillips (95 out of 103 patents)

silverMedal Hai-Ying Chen (83 out of 86 patents)

bronzeMedal Joseph Michael Fedeyko (70 out of 72 patents)

4.  Andrew Francis Chiffey (61 out of 65 patents)

5.  Guy Richard Chandler (58 out of 62 patents)

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