Granted Patent
Utility
US 4,302,245 · App. 06/161,291
Method for recovering zinc and zinc alloys from automobile scrap
Inventor:
Frederic T. Winters
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Jun 20, 1980
Inventor
Frederic T. Winters
Assignee (at issue)
American Can 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.