Granted Patent
Utility
US 4,384,098 · App. 06/224,771
Filamentary polypropylene and method of making
Inventors:
Gerald E. Hagler, Charles S. Hatcher
Patented Case
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Granted: May 17, 1983
Filed: Jan 13, 1981
Inventors
Gerald E. Hagler
Charles S. Hatcher
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.