Granted Patent
Utility
US 6,127,501 · App. 07/975,074
Polyethylene membrane steam-sterilizable at 134.degree. C.
Inventors:
Henricus M. Fortuin, Petrus H. M. Stokman
Patented Case
View Patent ↗
Granted: Oct 3, 2000
Filed: Nov 12, 1992
Inventors
Henricus M. Fortuin
Petrus H. M. Stokman
Assignee (at issue)
DSM N.V.
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.