Frederic C. Schaefer

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Darien, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of polymeric tertiary aralkyl isocyanat...
- Patent number 4,891,441
- Issue date Jan 2, 1990
- American Cyanamid
- Frederic C. Schaefer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Oligomers and homopolymers of meta- or para-isopropenyl-.alpha.,.al...
- Patent number 4,556,702
- Issue date Dec 3, 1985
- American Cyanamid Company
- Frederic C. Schaefer
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Quaternary amine carbamate or urea compounds based on isopropenyl-....
- Patent number 4,429,096
- Issue date Jan 31, 1984
- American Cyanamid Company
- Frederic C. Schaefer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Preparation of tertiary alkyl isocyanates
- Patent number 4,399,074
- Issue date Aug 16, 1983
- American Cyanamid Company
- Frederic C. Schaefer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of tertiary alkyl isocyanates
- Patent number 4,399,073
- Issue date Aug 16, 1983
- American Cyanamid Company
- Frederic C. Schaefer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of high purity methotrexate and derivat...
- Patent number 4,374,987
- Issue date Feb 22, 1983
- American Cyanamid Company
- Balwant Singh
- C07 - ORGANIC CHEMISTRY