Keith C. Yao

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Sarnia, CA

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Patents Grantslast 30 patents

Information Patent Grant
Removal of basic nitrogen compounds from extracted oils by use of a...
- Patent number 4,846,962
- Issue date Jul 11, 1989
- Exxon Research and Engineering Company
- Keith C. Yao
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Simultaneous removal of aromatics and wax from lube distillate by a...
- Patent number 4,808,300
- Issue date Feb 28, 1989
- Exxon Research and Engineering Company
- Keith C. Yao
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Used oil re-refining
- Patent number 4,512,878
- Issue date Apr 23, 1985
- Exxon Research and Engineering Co.
- Lloyd E. Reid
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...