Granted Patent
Utility
US 3,965,631 · App. 05/493,551
Fire rated grid-member with controlled expansion means
Inventor:
Gale E. Sauer
Patented Case
View Patent ↗
Granted: Jun 29, 1976
Filed: Aug 1, 1974
Inventor
Gale E. Sauer
Assignee (at issue)
Roblin Hope's Industries, Inc.
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.