Granted Patent
Utility
US 4,478,682 · App. 06/420,980
Sizing method and sizing composition for use therein
Inventors:
Ralph A. Bankert, David H. Dumas
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Sep 21, 1982
Inventors
Ralph A. Bankert
David H. Dumas
Assignee (at issue)
HERCULES LLC
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.