Granted Patent
Utility
US 4,310,338 · App. 06/135,780
Replaceable float oil separator
Inventors:
Ernest W. Schumacher, Stephen E. Evans
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Mar 31, 1980
Inventors
Ernest W. Schumacher
Stephen E. Evans
Assignee (at issue)
Virginia Chemicals 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.