Granted Patent
Utility
US 6,187,880 · App. 09/250,963
Process for producing an olefin polymer using a metallocene
Inventors:
M. Bruce Welch, Syriac J. Palackal, Bryan E. Hauger, David W. Dockter, Alexander Koppl, Helmut G. Alt
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Feb 16, 1999
Inventors
M. Bruce Welch
Syriac J. Palackal
Bryan E. Hauger
David W. Dockter
Alexander Koppl
Helmut G. Alt
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.