Granted Patent
Utility
US 5,158,721 · App. 07/755,968
Porous membrane formed from interpenetrating polymer network having hydrophilic surface
Inventors:
Anthony E. Allegrezza, Jr., Ellen C. Bellantoni
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Sep 6, 1991
Inventors
Anthony E. Allegrezza, Jr.
Ellen C. Bellantoni
Assignee (at issue)
Millipore Corporation
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.