Granted Patent
Utility
US 4,470,936 · App. 06/426,473
Method and apparatus for coinjecting two thermoplastic materials
Inventor:
Terry C. Potter
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Sep 29, 1982
Inventor
Terry C. Potter
Assignee (at issue)
Owens-Illinois Inc.
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.