Granted Patent
Utility
US 4,233,442 · App. 06/090,047
Copolymerizable, ultraviolet light absorber 4-allyloxybenzal-3'-alkyl-2'-benzothiazoloazines
Inventors:
Bruce A. Gruber, Donald H. Lorenz
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: Oct 31, 1979
Inventors
Bruce A. Gruber
Donald H. Lorenz
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.