William R. Lee

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East Providence, RI, US

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Patents Grantslast 30 patents

Information Patent Grant
Bis-N,N' nitro or amino benzoyl amino phenols
- Patent number 5,130,481
- Issue date Jul 14, 1992
- Hoechst Celanese Corporation
- Dinesh N. Khanna
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for bis(4-aminophenyl)hexafluoropropane
- Patent number 5,011,997
- Issue date Apr 30, 1991
- Hoechst Celanese Corp.
- James R. Hazen
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Azo dimers containing the hexafluoroisopropylidene group
- Patent number 4,906,741
- Issue date Mar 6, 1990
- Hoechst Celanese Corporation
- James R. Hazen