Granted Patent
Utility
US 4,260,809 · App. 06/132,195
Copolymerizable, ultraviolet light absorber 4-alkoxy-2'-acryloxy benzazines
Inventors:
Bruce A. Gruber, Donald H. Lorenz
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Mar 20, 1980
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.