Granted Patent
Utility
US 4,235,829 · App. 06/036,714
Vapor delivery system and method of maintaining a constant level of liquid therein
Inventor:
Fred P. Partus
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: May 7, 1979
Inventor
Fred P. Partus
Assignee (at issue)
Western Electric Company, 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.