Granted Patent
Utility
US 4,396,723 · App. 06/122,375
Lightweight silicate aggregate
Inventors:
Ralph E. Temple, William T. Gooding, Jr.
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Feb 19, 1980
Inventors
Ralph E. Temple
William T. Gooding, Jr.
Assignee (at issue)
Diamond Shamrock Corporation
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.