Granted Patent
Utility
US 4,727,112 · App. 07/017,121
Crystalline 1-butene polymer composition
Inventors:
Masaki Kohyama, Hiroyuki Hori
Patented Case
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Granted: Feb 23, 1988
Filed: Feb 20, 1987
Inventors
Masaki Kohyama
Hiroyuki Hori
Assignee (at issue)
SHELL OIL 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.