Granted Patent
Utility
US 4,159,617 · App. 05/147,688
Resilient polyester fibers
Inventor:
John Allan
Patented Case
View Patent ↗
Granted: Jul 3, 1979
Filed: May 27, 1971
Inventor
John Allan
Assignee (at issue)
Fiber Industries, 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.