Granted Patent
Utility
US 5,424,263 · App. 08/052,317
Supported polymerization catalyst
Inventor:
Charles K. Buehler
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Apr 23, 1993
Inventor
Charles K. Buehler
Assignee (at issue)
Quantum Chemical 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.