Granted Patent
Utility
US 4,357,296 · App. 06/228,276
Injection blow molding process
Inventor:
Robert X. Hafele
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Jan 26, 1981
Inventor
Robert X. Hafele
Assignee (at issue)
Ethyl 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.