Granted Patent
Utility
US 4,276,293 · App. 06/135,211
Compositions and their preparation
Inventors:
George Y. Lesher, Chester J. Opalka, Jr., Donald F. Page
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Mar 28, 1980
Inventors
George Y. Lesher
Chester J. Opalka, Jr.
Donald F. Page
Assignee (at issue)
Sterling Drug, Inc.
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.