Granted Patent
Utility
US 4,240,232 · App. 05/865,882
Coated abrasive superfinishing stone and method of making same
Inventor:
John C. Chwae
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Dec 30, 1977
Inventor
John C. Chwae
Assignee (at issue)
Giddings & Lewis, LLC
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.