Granted Patent
Utility
US 6,558,544 · App. 09/735,189
Pressure vessels for holding cylindrical semipermeable membrane cartridges
Inventors:
Douglas Eisberg, Andrew Panlasigui, Robert A. Uhlinger, Terry E. Gilbertson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Dec 4, 2000
Inventors
Douglas Eisberg
Andrew Panlasigui
Robert A. Uhlinger
Terry E. Gilbertson
Assignee (at issue)
Progressive Composite Technologies, 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.