Granted Patent
Utility
US 4,976,876 · App. 07/442,298
Point-of-use membrane filtration system
Inventors:
Charles Diman, David Marcus, Philip Mitchell, Baruch Sachs
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Nov 28, 1989
Inventors
Charles Diman
David Marcus
Philip Mitchell
Baruch Sachs
Assignee (at issue)
The Kendall Company LP
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.