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Donald E. Garrett
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Claremont, CA, US
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last 30 patents
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Patent Grant
Process for the gasification of coal in situ
Patent number
4,087,130
Issue date
May 2, 1978
Occidental Petroleum Corporation
Donald E. Garrett
E21 - EARTH DRILLING MINING
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Patent Grant
Process for in situ conversion of coal or the like into oil and gas
Patent number
4,057,293
Issue date
Nov 8, 1977
Donald E. Garrett
E21 - EARTH DRILLING MINING
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Patent Grant
Fracturing of pillars for enhancing recovery of oil from in situ oi...
Patent number
4,045,085
Issue date
Aug 30, 1977
Occidental Oil Shale, Inc.
Donald E. Garrett
E21 - EARTH DRILLING MINING
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Patent Grant
Multiple zone preparation of oil shale retort
Patent number
4,043,598
Issue date
Aug 23, 1977
Occidental Oil Shale, Inc.
Gordon B. French
E21 - EARTH DRILLING MINING