Granted Patent
Utility
US 6,657,023 · App. 09/773,296
Polymerization process
Inventors:
Joseph Bergmeister, III, Steven J. Secora, Gerhard Guenther, Elizabeth A. Benham, Max P. McDaniel
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Jan 31, 2001
Inventors
Joseph Bergmeister, III
Steven J. Secora
Gerhard Guenther
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.