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London, United Kingdom

Johnson Matthey & Co., Limited

USPTO Granted Patents = 106

Trademarks = 2

Forward Citations = 1,499

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81 inventors (with patents filed for the assignee):

Gary James Acres (10 out of 10 patents)

Gordon L Selman (10 out of 12 patents)

Paul C Hydes (9 out of 13 patents)

4. Bernard E Enga (8 out of 8 patents)

5. Arthur G Knapton (7 out of 7 patents)

6. Barry John Cooper (6 out of 6 patents)

7. Paul A Sermon (5 out of 6 patents)

8. Alan F Diwell (4 out of 8 patents)

9. Joseph G Day (4 out of 7 patents)

10. Alfred J Bird (4 out of 6 patents)

11. Ian R McGill (4 out of 7 patents)

12. John H Notton (4 out of 4 patents)

13. Michael J Cleare (3 out of 5 patents)

14. William David Evans (3 out of 3 patents)

15. John Garrick Priest (3 out of 3 patents)

Core Competencies:

Platinum Group Metals

Exhaust Gas Purification

Catalytic Reactions

Hydrogenation Processes

Ammonia Oxidation

Catalysts for Oxidation

Electrical Contacts

Heat Treatment

Catalytic Combustion

Metallic Alloys

Battery Electrodes

Platinum Coordination Compounds

106 patents: Sort by Forward Citations

1. 4737205 - Platinum group metal-containing alloy (1988-04-12),

2. 4683119 - Platinum group metal-containing alloy (1987-07-28),

3. 4478797 - Exhaust gas purification (1984-10-23),

4. 4469849 - Method for the hydrogenation of emulsified unsaturated organic compounds (1984-09-04),

5. 4469666 - Catalyst units for producing hydrocyanic acid (1984-09-04),

6. 4435373 - Fibre packs for ammonia oxidation (1984-03-06),

7. 4428768 - Process for the recovery of platinum group metals from refractory (1984-01-31),

8. 4418215 - Catalysts (1983-11-29),

9. 4414071 - Electrode (1983-11-08),

10. 4399199 - Protective layer (1983-08-16),

11. 4392292 - Forming process (1983-07-12),

12. 4389983 - Prechamber catalytic ignition system (1983-06-28),

13. 4384549 - Boilers (1983-05-24),

14. 4375550 - Hydrogenation of halogen-substituted aromatic nitro compounds (1983-03-01),

15. 4375426 - Catalytic fibre packs for ammonia oxidation (1983-03-01),

Johnson Matthey & Co., Limited is a global specialty chemicals and sustainable technologies company. They provide a range of innovative products and services to various industries including automotive, pharmaceutical, and chemicals. With a focus on sustainability, they develop solutions to reduce emissions, improve fuel efficiency, and enhance the quality of air and water. Johnson Matthey & Co., Limited is committed to creating a cleaner and healthier world through their expertise in advanced materials and technologies.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

106 Patents

#38 in London

#159 in United Kingdom

#7,173 in the World

London, United Kingdom

Johnson Matthey & Co., Limited

Forward Citations = 1,499

81 inventors:

Gary James Acres (10 out of 10 patents)

Gordon L Selman (10 out of 12 patents)

Paul C Hydes (9 out of 13 patents)

4. Bernard E Enga (8 out of 8 patents)

5. Arthur G Knapton (7 out of 7 patents)

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