Granted Patent
Utility
US 4,199,644 · App. 05/860,264
Method for the production of a needled nonwoven fabric
Inventor:
Louis Platt
Patented Case
View Patent ↗
Granted: Apr 22, 1980
Filed: Dec 13, 1977
Inventor
Louis Platt
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.