Granted Patent
Utility
US 4,171,400 · App. 05/875,317
Shaped press-forged normally frangible inorganic crystals
Inventors:
King H. Rosette, Herbert Packer
Patented Case
View Patent ↗
Granted: Oct 16, 1979
Filed: Feb 6, 1978
Inventors
King H. Rosette
Herbert Packer
Assignee (at issue)
The Harshaw Chemical 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.