Granted Patent
Utility
US 4,299,593 · App. 06/031,990
Method and apparatus for detecting and measuring a gas
Inventor:
Robert B. Dopp
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Apr 20, 1979
Inventor
Robert B. Dopp
Assignee (at issue)
The Upjohn Co.
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.