Granted Patent
Utility
US 4,388,260 · App. 06/223,465
Method of making viscose rayon
Inventor:
Gregory C. Bockno
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jan 8, 1981
Inventor
Gregory C. Bockno
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.