Granted Patent
Utility
US 4,780,333 · App. 06/947,063
Method for treatment of air conditioning system
Inventors:
Calvin G. Smith, Lee Carrick, Jr.
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Dec 29, 1986
Inventors
Calvin G. Smith
Lee Carrick, Jr.
Assignee (at issue)
Ford Motor 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.