Granted Patent
Utility
US 4,276,348 · App. 06/109,954
High tenacity polyethylene fibers and process for producing same
Inventors:
Wen-Li Wu, William B. Black
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Jan 7, 1980
Inventors
Wen-Li Wu
William B. Black
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.