Granted Patent
Utility
US 4,650,842 · App. 06/723,110
Olefin polymerization process employing catalyst prepared from high pore volume, high purity alumina gel
Inventors:
Anthony N. Speca, Roger D. Laib
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Apr 15, 1985
Inventors
Anthony N. Speca
Roger D. Laib
Assignee (at issue)
National Distillers and 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.