Granted Patent
Utility
US 4,416,936 · App. 06/334,507
Nonwoven fabric and method for its production
Inventors:
Wayne K. Erickson, Lewis R. Mulligan
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Dec 28, 1981
Inventors
Wayne K. Erickson
Lewis R. Mulligan
Assignee (at issue)
Phillips Petroleum 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.