Granted Patent
Utility
US 4,175,067 · App. 05/825,447
Curable binder for large foundry sand shapes
Inventors:
Roger H. Kottke, Scott Menard
Patented Case
View Patent ↗
Granted: Nov 20, 1979
Filed: Aug 17, 1977
Inventors
Roger H. Kottke
Scott Menard
Assignee (at issue)
The Quaker Oats 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.