Granted Patent
Utility
US 5,281,696 · App. 07/986,191
Removal of hydrogenation catalyst from polymer solutions by trialkyl aluminum precipitation
Inventor:
Carma J. Gibler
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Dec 7, 1992
Inventor
Carma J. Gibler
Assignee (at issue)
SHELL OIL COMPANY
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.