Granted Patent
Utility
US 4,603,070 · App. 06/777,739
Non-woven fibrous materials
Inventors:
Margaret L. Steel, Philip Norton-Berry
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Sep 19, 1985
Inventors
Margaret L. Steel
Philip Norton-Berry
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.