Granted Patent
Utility
US 6,709,494 · App. 10/289,248
High temperature membrane module tubesheet composed of thermoset resin blends
Inventors:
James Timothy Macheras, Salvatore Giglia
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Nov 7, 2002
Inventors
James Timothy Macheras
Salvatore Giglia
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.