Robert F. Helwing

Follow

Person

Sunnyvale, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Covalently bonded active agents with carbonium ion base groups
- Patent number 4,842,868
- Issue date Jun 27, 1989
- Robert F. Helwing
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Preparation of ketene acetals by rearrangement of allyl and substit...
- Patent number 4,532,335
- Issue date Jul 30, 1985
- SRI International
- Robert F. Helwing
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Polymers of di- (and higher functionality) ketene acetals and polyols
- Patent number 4,304,767
- Issue date Dec 8, 1981
- SRI International
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE