Granted Patent
Utility
US 4,414,441 · App. 06/364,641
Hydrocarbon responsive switch
Inventors:
Ralph A. Perry, Raymond J. Andrejasich
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Apr 2, 1982
Inventors
Ralph A. Perry
Raymond J. Andrejasich
Assignee (at issue)
Emhart Industries, 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.