Granted Patent
Utility
US 4,740,535 · App. 07/022,933
Phenolic resin binders for foundry and refractory uses
Inventors:
Raja Iyer, Rasik C. Shah
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Mar 6, 1987
Inventors
Raja Iyer
Rasik C. Shah
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.