Granted Patent
Utility
US 4,415,522 · App. 06/238,852
Process for the continuous production of high modulus filament of polyethylene
Inventors:
Giancarlo Capaccio, Francis S. Smith, Ian MacMillan Ward
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Feb 27, 1981
Inventors
Giancarlo Capaccio
Francis S. Smith
Ian MacMillan Ward
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.