Granted Patent
Utility
US 6,290,756 · App. 08/984,633
Hollow fiber membrane tubesheets of variable epoxy composition and hardness
Inventors:
James Timothy Macheras, Cheryl Ford, Joyce K. Nelson
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Dec 3, 1997
Inventors
James Timothy Macheras
Cheryl Ford
Joyce K. Nelson
Assignee (at issue)
Praxair Technology, Inc.
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.