Granted Patent
Utility
US 4,732,912 · App. 06/604,964
Phenol derivatives
Inventors:
William R. Pilgrim, Derek W. Young, Brian S. Tait, Graham C. Crawley, Philip N. Edwards, George B. Hill
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Apr 27, 1984
Inventors
William R. Pilgrim
Derek W. Young
Brian S. Tait
Graham C. Crawley
Philip N. Edwards
George B. Hill
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.