IP Library › Granted Patent US 4,539,817
Granted Patent Utility
US 4,539,817 · App. 06/564,757

Refrigerant recovery and charging device

Inventors: Michael Staggs, Gary Starnes
Patented Case View Patent ↗
Granted: Sep 10, 1985 Filed: Dec 23, 1983
Inventors
Michael Staggs
Gary Starnes

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.

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Quick Facts
Patent No.
US 4,539,817
App. No.
06/564,757
Filed
1983-12-23
Granted
1985-09-10
Kind
A