Granted Patent
Utility
US 4,411,783 · App. 06/333,832
Arterial blood filter with improved gas venting
Inventors:
Duane Dickens, Francis M. Servas
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Dec 23, 1981
Inventors
Duane Dickens
Francis M. Servas
Assignee (at issue)
Shiley Incorporated
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.