Granted Patent
Utility
US 4,164,841 · App. 05/838,799
Method and apparatus for continuous formation of bulked and entangled multifilament yarn
Inventors:
David E. Borenstein, Jack A. Banning
Patented Case
View Patent ↗
Granted: Aug 21, 1979
Filed: Oct 3, 1977
Inventors
David E. Borenstein
Jack A. Banning
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.