Granted Patent
Utility
US 4,288,538 · App. 06/008,124
Test method and composition therefor
Inventors:
Ernest V. Groman, Marian E. Sacco
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jan 31, 1979
Inventors
Ernest V. Groman
Marian E. Sacco
Assignee (at issue)
Baxter Travenol Laboratories, 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.