Granted Patent
Utility
US 4,323,710 · App. 06/203,026
Partial alkylation of polyhydroxybenzophenones
Inventors:
Allan Wexler, Paritosh M. Chakrabarti, Michael J. Brown
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Nov 3, 1980
Inventors
Allan Wexler
Paritosh M. Chakrabarti
Michael J. Brown
Assignee (at issue)
GAF Corporation
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.