Granted Patent
Utility
US 5,234,973 · App. 07/757,992
Compositions for foundry molding processes utilizing reclaimed sand
Inventors:
S. Raja Iyer, Calvin K. Johnson, Richard Cooke
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Sep 12, 1991
Inventors
S. Raja Iyer
Calvin K. Johnson
Richard Cooke
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.