Granted Patent
Utility
US 4,317,859 · App. 06/167,981
Soil-resistant yarns
Inventor:
Andrew Smith
Patented Case
View Patent ↗
Granted: Mar 2, 1982
Filed: Jul 14, 1980
Inventor
Andrew Smith
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.