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Toronto, Canada

Sherritt Gordon Mines Limited

USPTO Granted Patents = 74

Trademarks = 2

Forward Citations = 925

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67 inventors (with patents filed for the assignee):

Donald R Weir (28 out of 28 patents)

Roman M Genik-Sas-Berezowsky (15 out of 15 patents)

Ian M Masters (10 out of 13 patents)

4. Wasyl Kunda (8 out of 10 patents)

5. Godefridus M Swinkels (8 out of 13 patents)

6. Maurice A Clegg (7 out of 7 patents)

7. Verner B Sefton (7 out of 7 patents)

8. Michael J Ruscoe (6 out of 6 patents)

9. Gerald L Bolton (5 out of 5 patents)

10. Willie H Seibt (4 out of 4 patents)

11. Derek G Kerfoot (3 out of 9 patents)

12. Edward Francis Milner (3 out of 7 patents)

13. Charles Ray Kirby (3 out of 4 patents)

14. Kshitindra M Sarkar (3 out of 3 patents)

15. Michael E Chalkley (2 out of 6 patents)

Core Competencies:

Zinc Recovery

Hydrometallurgical Treatment

Cobalt Powder

Precious Metals Extraction

Copper Production

Sulphidic Material

Silver Recovery

Nickel Clad Steel

Electroforming

Iron Precipitation

Metal Sulphides

Coin Blanks

74 patents: Sort by Forward Citations

1. 4832925 - Recovery of zinc from zinc-containing sulphidic material (1989-05-23),

2. 4821800 - Filtering media for controlling the flow of sand during oil well (1989-04-18),

3. 4746378 - Process for producing Sm.sub.2 Co.sub.17 alloy suitable for use as (1988-05-24),

4. 4709148 - Quadrupole mass spectrometers (1987-11-24),

5. 4645532 - Production of fine spherical copper powder (1987-02-24),

6. 4632701 - Process for the recovery of silver from a residue essentially free of (1986-12-30),

7. 4610724 - Recovery of gold from refractory auriferous iron-containing sulphidic (1986-09-09),

8. 4606948 - Process for the production of nickel-chromium/chromium carbide coatings (1986-08-19),

9. 4606766 - Process for separately recovering gold and silver from solution by (1986-08-19),

10. 4606763 - Process for the pressure oxidation acid leaching of non-ferrous metal (1986-08-19),

11. 4605439 - Recovery of gold from refractory auriferous iron-containing sulphidic (1986-08-12),

12. 4594102 - Recovery of cobalt and nickel from sulphidic material (1986-06-10),

13. 4579761 - Method of making aureate colored coins, medallions and tokens and (1986-04-01),

14. 4571264 - Recovery of gold from refractory auriferous iron-containing sulphidic ore (1986-02-18),

15. 4571263 - Recovery of gold from refractory auriferous iron-containing sulphidic (1986-02-18),

Company Overview

Sherritt Gordon Mines Limited, headquartered in Toronto, Canada, specializes in hydrometallurgical processes for the recovery of various metals. The company focuses on innovative techniques for zinc recovery, cobalt powder production, and precious metals extraction. Additionally, it is involved in copper production and the treatment of sulphidic materials, enhancing the efficiency of metal recovery. Sherritt's expertise extends to silver recovery and the development of nickel clad steel, positioning it as a key player in the mining and metallurgy sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

74 Patents

#18 in Toronto

#172 in Canada

#10,140 in the World

Toronto, Canada

Sherritt Gordon Mines Limited

Forward Citations = 925

67 inventors:

Donald R Weir (28 out of 28 patents)

Roman M Genik-Sas-Berezowsky (15 out of 15 patents)

Ian M Masters (10 out of 13 patents)

4. Wasyl Kunda (8 out of 10 patents)

5. Godefridus M Swinkels (8 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sherritt Gordon Mines Limited. Retrieved from https://idiyas.com/company/sherritt-gordon-mines

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]

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