Granted Patent
Utility
US 4,689,147 · App. 06/780,928
Plastic filter assembly
Inventors:
Richard A. Leoncavallo, Peter K. Baird, Ravinder C. Mehra, Sharad Rajguru
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Sep 27, 1985
Inventors
Richard A. Leoncavallo
Peter K. Baird
Ravinder C. Mehra
Sharad Rajguru
Assignee (at issue)
Nalge 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.