Granted Patent
Utility
US 6,537,475 · App. 08/522,123
Melt extrusion spinning polyamide fibers with sulfonated reagent
Inventor:
Matthew Studholme
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Aug 31, 1995
Inventor
Matthew Studholme
Assignee (at issue)
Prisma 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.