Donald W. H. Penhale

Person

Menlo Park, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Ortho and thio-ortho ester polymer
- Patent number 5,013,821
- Issue date May 7, 1991
- Pharmaceutical Delivery Systems, Inc.
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Polymers containing acetal, carboxy-acetal, ortho ester and carboxy...
- Patent number 4,957,998
- Issue date Sep 18, 1990
- Pharmaceutical Delivery Systems, Inc.
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Polymers containing carboxy-ortho ester and ortho ester linkages
- Patent number 4,946,931
- Issue date Aug 7, 1990
- Pharmaceutical Delivery Systems, Inc.
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Polyacetal and polyketal hydrogels formed from acetals or ketals an...
- Patent number 4,898,928
- Issue date Feb 6, 1990
- Sandoz Pharmaceuticals Corp.
- Jorge Heller
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method of preparing bioerodible polymers having pH sensitivity in t...
- Patent number 4,855,132
- Issue date Aug 8, 1989
- S R I International
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Polyacetal hydrogels formed from divinyl ethers and polyols
- Patent number 4,801,457
- Issue date Jan 31, 1989
- Sandoz Pharm. Corp.
- Jorge Heller
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method of preparing bioerodible polymers having pH sensitivity in t...
- Patent number 4,764,364
- Issue date Aug 16, 1988
- S R I International
- Jorge Heller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Polyacetal hydrogels formed from divinyl ethers and polyols
- Patent number 4,713,441
- Issue date Dec 15, 1987
- Sandoz Pharmaceuticals Corp.
- Jorge Heller
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Preparation of ketene acetals
- Patent number 4,513,143
- Issue date Apr 23, 1985
- SRI International
- Steven Y. Ng
- 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

Donald W. H. Penhale

Person

Patents Grantslast 30 patents

Ortho and thio-ortho ester polymer

Polymers containing acetal, carboxy-acetal, ortho ester and carboxy...

Polymers containing carboxy-ortho ester and ortho ester linkages

Polyacetal and polyketal hydrogels formed from acetals or ketals an...

Method of preparing bioerodible polymers having pH sensitivity in t...

Polyacetal hydrogels formed from divinyl ethers and polyols

Method of preparing bioerodible polymers having pH sensitivity in t...

Polyacetal hydrogels formed from divinyl ethers and polyols

Preparation of ketene acetals

Polymers of di- (and higher functionality) ketene acetals and polyols