Granted Patent
Utility
US 4,471,087 · App. 06/470,393
Formaldehyde-free insolubilizers for binders for paper coating compositions
Inventor:
Stanley A. Lipowski
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Feb 28, 1983
Inventor
Stanley A. Lipowski
Assignee (at issue)
Diamond Shamrock Chemicals 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.