Granted Patent
Utility
US 6,589,466 · App. 09/945,820
Yarn by extruding polyamide fibers and sulfonated polyester concentrate
Inventor:
Matthew Studholme
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Sep 5, 2001
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.