Granted Patent
Utility
US 4,929,648 · App. 07/328,174
Alkaline phenolic resole resin binders
Inventors:
David R. Armbruster, Kwok-tuen Tse
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Mar 24, 1989
Inventors
David R. Armbruster
Kwok-tuen Tse
Assignee (at issue)
Acme Resin Corp.
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.