Granted Patent
Utility
US 4,865,535 · App. 07/187,310
Injection molding nozzle having multiple thickness heating element
Inventor:
Jobst U. Gellert
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Apr 28, 1988
Inventor
Jobst U. Gellert
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.