Granted Patent
Utility
US 4,363,665 · App. 06/283,137
Novel sand/silicate compositions for foundry molds/cores
Inventors:
Gerard Barrier, Jean-Pierre Blanc
Patented Case
View Patent ↗
Granted: Dec 14, 1982
Filed: Jul 14, 1981
Inventors
Gerard Barrier
Jean-Pierre Blanc
Assignee (at issue)
Rhone-Poulenc Industries
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.