Granted Patent
Utility
US 4,535,013 · App. 06/523,493
Addition of resins to latex bonded nonwoven fabrics for improved strength
Inventor:
Beryl M. Kuhn
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Aug 15, 1983
Inventor
Beryl M. Kuhn
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.