Granted Patent
Utility
US 4,534,161 · App. 06/645,988
Ring spinning processes for converting sliver to carpet yarn
Inventors:
Don E. Fisher, Arnold E. Wilkie
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Aug 31, 1984
Inventors
Don E. Fisher
Arnold E. Wilkie
Assignee (at issue)
Monsanto 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.