Granted Patent
Utility
US 4,660,779 · App. 06/855,021
Multilayer precision wound filter cartridge
Inventors:
Stephen A. Nemesi, James R. Schmitz
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Apr 22, 1986
Inventors
Stephen A. Nemesi
James R. Schmitz
Assignee (at issue)
Dorr-Oliver 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.