Granted Patent
Utility
US 4,160,700 · App. 05/768,311
Petri dish
Inventors:
Mary K. Boomus, Bernard Sobin, John C. Schweitzer
Patented Case
View Patent ↗
Granted: Jul 10, 1979
Filed: Feb 14, 1977
Inventors
Mary K. Boomus
Bernard Sobin
John C. Schweitzer
Assignee (at issue)
Gelman Instrument Company
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.