Forward Citations = 49

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5 inventors (with patents filed for the assignee):

John James MacGregor (3 out of 6 patents)

Douglas S Flett (1 out of 2 patents)

John Blunden Payne (1 out of 5 patents)

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

5. John Hill (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 4451290 - Recovery of platinum group metals from scrap and residues (1984-05-29),

2. 4210625 - Process for separating cobalt and nickel by solvent extraction (1980-07-01),

3. 4162950 - Treatment of effluents (1979-07-31),

4. 4127458 - Treatment of effluents (1978-11-28),

5. 3979207 - Refining of noble group metals (1976-09-07),

6. 3967956 - Separation of noble metals (1976-07-06),

Company Overview

Matthey Rustenburg Refiners (Pty) Ltd is a leading producer of precious metal products in South Africa. With over 100 years of experience in the industry, we specialize in refining and recycling precious metals such as gold, silver, platinum, and palladium. Our state-of-the-art facilities and advanced technologies allow us to deliver high-quality products and services to our customers worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#17 in Johannesburg

#67 in South Africa

Johannesburg, South Africa

Matthey Rustenburg Refiners (Proprietary)

Forward Citations = 49

5 inventors:

John James MacGregor (3 out of 6 patents)

Douglas S Flett (1 out of 2 patents)

John Blunden Payne (1 out of 5 patents)

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

5. John Hill (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Matthey Rustenburg Refiners (Proprietary). Retrieved from https://idiyas.com/company/matthey-rustenburg-refiners-proprietary

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]