Granted Patent
Utility
US 4,898,667 · App. 07/167,658
Point-of-use membrane filtration system
Inventors:
Charles Diman, David Marcus, Philip Mitchell, Samuel B. Sachs
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Mar 14, 1988
Inventors
Charles Diman
David Marcus
Philip Mitchell
Samuel B. 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.