Granted Patent
Utility
US 5,198,110 · App. 07/718,975
Bundle of permselective hollow fibers and a fluid separator containing the same
Inventors:
Tomoji Hanai, Yoshiaki Nitadori, Joji Nishikido, Tetsuo Watanabe
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Jun 21, 1991
Inventors
Tomoji Hanai
Yoshiaki Nitadori
Joji Nishikido
Tetsuo Watanabe
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.