Donald Bremner Urquhart

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Patents Grantslast 30 patents

Information Patent Grant
Gas extraction of coal
- Patent number 4,028,220
- Issue date Jun 7, 1977
- Coal Industry (Patents) Limited
- Donald Bremner Urquhart
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Hydrogenation of coal
- Patent number 4,019,975
- Issue date Apr 26, 1977
- Coal Industry (Patents) Limited
- Donald Bremner Urquhart
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Hydrogenative treatment of coal
- Patent number 3,997,424
- Issue date Dec 14, 1976
- Coal Industry (Patents) Limited
- Donald Bremner Urquhart
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...