Granted Patent
Utility
US 6,432,309 · App. 09/423,267
Polysulfone-base hollow-fiber hemocathartic membrane and processes for the production thereof
Inventors:
Masaya Fuke, Toshiaki Kuroki, Tsuyoshi Tanaka
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Nov 4, 1999
Inventors
Masaya Fuke
Toshiaki Kuroki
Tsuyoshi Tanaka
Assignee (at issue)
ASAHI MEDICAL CO., LTD
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.