Yumi P. Ryu

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Murrysville, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Lubricating oils containing quaternary ammonium thiomolybdates
- Patent number 4,400,282
- Issue date Aug 23, 1983
- Gulf Research & Development Company
- Gary M. Singerman
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Lubricating oils containing molybdenyl chelates
- Patent number 4,383,931
- Issue date May 17, 1983
- Gulf Research & Development Company
- Yumi P. Ryu
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Grease compositions containing quaternary ammonium thiomolybdates
- Patent number 4,370,245
- Issue date Jan 25, 1983
- Gulf Research & Development Company
- Yumi P. Ryu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of quaternary ammonium thiomolybdates
- Patent number 4,343,747
- Issue date Aug 10, 1982
- Gulf Research & Development Company
- Yumi P. Ryu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Quaternary ammonium thiomolybdates
- Patent number 4,343,746
- Issue date Aug 10, 1982
- Gulf Research & Development Company
- James R. Anglin
- C07 - ORGANIC CHEMISTRY