Granted Patent
Utility
US 4,326,579 · App. 06/114,398
Method of forming a filament through melt extraction
Inventors:
Robert B. Pond, Sr., John M. Winter
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Jan 23, 1980
Inventors
Robert B. Pond, Sr.
John M. Winter
Assignee (at issue)
National Standard 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.