Granted Patent
Utility
US 6,255,413 · App. 08/991,318
Process to produce branched polymers from ethylene feedstock
Inventors:
Elizabeth A. Benham, Max P. McDaniel
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Dec 16, 1997
Inventors
Elizabeth A. Benham
Max P. McDaniel
Assignee (at issue)
Phillips Petroleum 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.