Granted Patent
Utility
US 4,312,995 · App. 06/168,224
Copolymerizable ultraviolet light absorber members which are .alpha.,.beta. -
Inventors:
Eugene S. Barabas, Prakash Mallya, Stanley J. Gromelski, Jr.
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Jul 10, 1980
Inventors
Eugene S. Barabas
Prakash Mallya
Stanley J. Gromelski, Jr.
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.