Granted Patent
Utility
US 6,339,035 · App. 09/255,213
Catalyst and process for polymerizing olefins
Inventor:
Joel L. Martin
Patented Case
View Patent ↗
Granted: Jan 15, 2002
Filed: Feb 22, 1999
Inventor
Joel L. Martin
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.