Granted Patent
Utility
US 5,723,402 · App. 08/655,178
Silicas with specific contents of cations as supports for olefin polymerization catalysts
Inventors:
Thomas J. Pullukat, Ronald S. Shinomoto, Carl A. Gillings
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: May 30, 1996
Inventors
Thomas J. Pullukat
Ronald S. Shinomoto
Carl A. Gillings
Assignee (at issue)
PQ 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.