Granted Patent
Utility
US 4,199,367 · App. 05/790,129
Alloy rayon
Inventor:
Frederick R. Smith
Patented Case
View Patent ↗
Granted: Apr 22, 1980
Filed: Apr 22, 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.