Granted Patent
Utility
US 4,256,547 · App. 06/057,058
Universal chromic acid anodizing method
Inventors:
Earl W. Turns, Robert E. Forrester, Jr., Arthur C. Porter
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Jul 12, 1979
Inventors
Earl W. Turns
Robert E. Forrester, Jr.
Arthur C. Porter
Assignee (at issue)
General Dynamics 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.