Granted Patent
Utility
US 4,797,175 · App. 07/112,359
Method for making solid element fluid filter for removing small particles from fluids
Inventors:
M. Edmund Ellion, Philip A. Donatelli, George D. Wolff
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Oct 26, 1987
Inventors
M. Edmund Ellion
Philip A. Donatelli
George D. Wolff
Assignee (at issue)
Hughes Aircraft 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.