Stephen Michael O'Brien

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Foam drive oil displacement with outflow pressure cycling
- Patent number 4,601,337
- Issue date Jul 22, 1986
- Shell Oil Company
- Hon C. Lau
- E21 - EARTH DRILLING MINING
Information Patent Grant
Coal disaggregation by basic aqueous solution for slurry recovery
- Patent number 4,032,193
- Issue date Jun 28, 1977
- Shell Oil Company
- Gary Drinkard
- E21 - EARTH DRILLING MINING