Helen I. Thayer

Follow

Person

Oakmont, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Process for improving color of certain alkenyl succinic anhydrides
- Patent number 4,158,664
- Issue date Jun 19, 1979
- Gulf Research & Development Company
- Charles M. Selwitz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Dithiophosphorylated copolymers of aziridineethyl acrylates or meth...
- Patent number 4,148,981
- Issue date Apr 10, 1979
- Gulf Research & Development Company
- John P. Pellegrini
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Lubricating oils containing dithiophosphorylated copolymers of azir...
- Patent number 4,136,042
- Issue date Jan 23, 1979
- Gulf Research & Development Company
- John P. Pellegrini
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Paraffin wax composition
- Patent number 4,118,244
- Issue date Oct 3, 1978
- Gulf Research & Development Company
- Charles M. Selwitz
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...