Granted Patent
Utility
US 6,802,972 · App. 09/890,109
Microporous hollow fiber membranes from perfluorinated thermoplastic polymers
Inventors:
Kwok-Shun Cheng, Rajnikant Patel, T. Dean Gates
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Jul 26, 2001
Inventors
Kwok-Shun Cheng
Rajnikant Patel
T. Dean Gates
Assignee (at issue)
Mykrolis 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.