Granted Patent
Utility
US 5,630,353 · App. 08/665,276
Compressor piston with a basic hollow design
Inventors:
Kurt R. Mittlefehldt, Daniel KURBIEL, Michael G. Thurston, David M. Ebbing
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Jun 17, 1996
Inventors
Kurt R. Mittlefehldt
Daniel KURBIEL
Michael G. Thurston
David M. Ebbing
Assignee (at issue)
General Motors LLC
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.