Darrell E. O'Brien

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Mission Viejo, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
3,5,7-Trisubstituted pyrazolo[1,5-a]pyrimidines
- Patent number 4,093,617
- Issue date Jun 6, 1978
- ICN Pharmaceuticals, Inc.
- Roland K. Robins
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
2-Substituted-s-triazolo[1,5a]pyrimidines
- Patent number 4,036,840
- Issue date Jul 19, 1977
- ICN Pharmaceuticals
- Darrell E. O'Brien
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Xanthine oxidase inhibitors
- Patent number 4,021,556
- Issue date May 3, 1977
- ICN Pharmaceuticals, Inc.
- Robert H. Springer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE