Granted Patent
Utility
US 4,957,517 · App. 07/345,147
Sound attenuating liquid-gas separator
Inventor:
Peter J. Linnert
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Apr 28, 1989
Inventor
Peter J. Linnert
Assignee (at issue)
American Standard 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.