Granted Patent
Utility
US 4,246,317 · App. 06/023,859
Silicate coated metal tying wire and process for coating said wire
Inventor:
Lawrence Helwig
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Mar 26, 1979
Inventor
Lawrence Helwig
Assignee (at issue)
United States Steel 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.