Granted Patent
Utility
US 4,052,316 · App. 05/658,222
Composite coalescing filter tube
Inventors:
Leo Berger, Denis D. Guequierre
Patented Case
View Patent ↗
Granted: Oct 4, 1977
Filed: Feb 17, 1976
Inventors
Leo Berger
Denis D. Guequierre
Assignee (at issue)
Finite Filter Company, 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.