Granted Patent
Utility
US 4,892,558 · App. 07/370,099
Process for dyeing stain resistant nylon carpets
Inventors:
Randolph C. Blyth, Pompelio A. Ucci
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Jun 21, 1989
Inventors
Randolph C. Blyth
Pompelio A. Ucci
Assignee (at issue)
Monsanto 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.