Granted Patent
Utility
US 4,654,154 · App. 06/426,409
Method of reducing compressor gas leakage
Inventors:
Karl W. Wikelski, Michael Conrad
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Sep 29, 1982
Inventors
Karl W. Wikelski
Michael Conrad
Assignee (at issue)
El Paso Polyolefins 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.