Granted Patent
Utility
US 5,503,745 · App. 08/249,866
Filtering medium and a process for producing the same
Inventors:
Satoshi Ogata, Kazue Nishio
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: May 26, 1994
Inventors
Satoshi Ogata
Kazue Nishio
Assignee (at issue)
Chisso 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.