Granted Patent
Utility
US 4,421,707 · App. 06/373,090
Acrylic wet spinning process
Inventors:
Raymond E. Kourtz, Shashikumar H. Daftary
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Apr 29, 1982
Inventors
Raymond E. Kourtz
Shashikumar H. Daftary
Assignee (at issue)
American Cyanamid 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.