Granted Patent
Utility
US 6,214,463 · App. 09/202,155
Hydrophilic fibers and cloth-like articles and filters made by using the same
Inventors:
Masaru Nishijima, Masayasu Suzuki, Satoshi Ogata, Kozo Tanoue
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Dec 9, 1998
Inventors
Masaru Nishijima
Masayasu Suzuki
Satoshi Ogata
Kozo Tanoue
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.