Granted Patent
Utility
US 4,772,631 · App. 06/889,857
Phenyl ethers
Inventors:
Brian R. Holloway, Ralph Howe, Balbir S. Rao, Donald Stribling
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Jul 28, 1986
Inventors
Brian R. Holloway
Ralph Howe
Balbir S. Rao
Donald Stribling
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.