Granted Patent
Utility
US 4,754,619 · App. 06/908,462
Heat-set chamber redesign for uniform heat setting of carpet yarns
Inventor:
Kenneth Keith
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Sep 17, 1986
Inventor
Kenneth Keith
Assignee (at issue)
West Point Pepperell
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.