Granted Patent
Utility
US 4,350,657 · App. 06/204,001
Low-energy extruder-pump system
Inventors:
David N. Jones, Archibald L. Burnett, John C. Miller
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Nov 4, 1980
Inventors
David N. Jones
Archibald L. Burnett
John C. Miller
Assignee (at issue)
Union Carbide Corporation
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.