Granted Patent
Utility
US 4,935,151 · App. 07/274,434
Process and apparatus for degassing and filtering liquids
Inventor:
Dac-Vong Do
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Nov 22, 1988
Inventor
Dac-Vong Do
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.