Granted Patent
Utility
US 4,925,903 · App. 07/408,982
Process of making a polymer containing hindered amine light stabilizing groups and polymer made thereby
Inventor:
Terry N. Myers
Patented Case
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Granted: May 15, 1990
Filed: Sep 18, 1989
Inventor
Terry N. Myers
Assignee (at issue)
Pennwalt 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.