Granted Patent
Utility
US 5,457,528 · App. 08/038,892
Identification and quantificaation of refrigerants
Inventor:
Reginald Tobias
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Mar 29, 1993
Inventor
Reginald Tobias
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.