Granted Patent
Utility
US 6,432,864 · App. 09/832,502
Acid-blocked amine catalysts for the production of polyurethanes
Inventors:
Stephan Herman Wendel, Reza Fard-Aghaie
Patented Case
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Granted: Aug 13, 2002
Filed: Apr 11, 2001
Inventors
Stephan Herman Wendel
Reza Fard-Aghaie
Assignee (at issue)
Air Products and Chemicals, 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.