Granted Patent
Utility
US 4,820,571 · App. 06/513,047
High temperature industrial fabrics
Inventor:
Harry I. Searfass
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Jul 12, 1983
Inventor
Harry I. Searfass
Assignee (at issue)
Asten, Inc.
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.