Granted Patent
Utility
US 4,144,079 · App. 05/811,793
Rayon fibers containing starch
Inventor:
Frederick R. Smith
Patented Case
View Patent ↗
Granted: Mar 13, 1979
Filed: Jun 30, 1977
Inventor
Frederick R. Smith
Assignee (at issue)
Avtex Fibers Inc.
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.