Granted Patent
Utility
US 5,003,095 · App. 07/490,313
Process for preparing methylaluminoxanes
Inventor:
William R. Beard
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Mar 8, 1990
Inventor
William R. Beard
Assignee (at issue)
Ethyl 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.