For the Inventor, By the Inventor

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Johannesburg, South Africa

Matthey Rustenburg Refiners (Pty) Limited

USPTO Granted Patents = 11

Forward Citations = 50

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12 inventors (with patents filed for the assignee):

Richard Alasdair Grant (4 out of 12 patents)

Raymond Edward Oliver (4 out of 4 patents)

John Blunden Payne (2 out of 5 patents)

4. George McGuire (2 out of 2 patents)

5. Christopher S Smith (1 out of 1 patent)

6. Yvonne Taylor (1 out of 1 patent)

7. Raymond Edward Oliver (1 out of 1 patent)

8. George McGuire (1 out of 1 patent)

9. Joseph G Day (1 out of 7 patents)

10. John J MacGregor (1 out of 1 patent)

11. Kenneth J Shanton (1 out of 1 patent)

12. Jeffrey R Taylor (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 5879644 - Interseparation of platinum group metals (1999-03-09),

2. 5478376 - Method for the separation of rhodium and/or iridium from solution (1995-12-26),

3. 4448604 - Recovery of precious metals from leach residues (1984-05-15),

4. 4382067 - Solvent extraction of platinum group metals (1983-05-03),

5. 4331634 - Solvent extraction process for the selective extraction of palladium (1982-05-25),

6. 4260139 - Refining of metals (1981-04-07),

7. 4201636 - Electrochemical destruction of stable complexes (1980-05-06),

8. 4145187 - Treatment of material with hydrogen chloride (1979-03-20),

9. 4086084 - Refining of metals (1978-04-25),

10. 4002469 - Separation of metals (1977-01-11),

11. 3998926 - Treatment of material with hydrogen chloride (1976-12-21),

Matthey Rustenburg Refiners (pty) Limited is a leading precious metals company specializing in the refining of platinum group metals. With state-of-the-art facilities and a dedicated team of experts, we provide high-quality services to our clients in the mining industry. Our commitment to excellence and sustainability sets us apart in the industry.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

11 Patents

#8 in Johannesburg

#35 in South Africa

#50,255 in the World

Johannesburg, South Africa

Matthey Rustenburg Refiners (Pty) Limited

Forward Citations = 50

12 inventors:

Richard Alasdair Grant (4 out of 12 patents)

Raymond Edward Oliver (4 out of 4 patents)

John Blunden Payne (2 out of 5 patents)

4. George McGuire (2 out of 2 patents)

5. Christopher S Smith (1 out of 1 patent)

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