Granted Patent
Utility
US 4,262,102 · App. 06/100,830
Polymerization with sublimed chromium catalyst
Inventors:
Raymond E. Hoff, Thomas J. Pullukat
Patented Case
View Patent ↗
Granted: Apr 14, 1981
Filed: Dec 6, 1979
Inventors
Raymond E. Hoff
Thomas J. Pullukat
Assignee (at issue)
Chemplex, Ltd.
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.