Granted Patent
Utility
US 5,997,797 · App. 08/881,631
Injection mold internal pressure equalization system and method
Inventor:
John M. Heuchert
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Jun 24, 1997
Inventor
John M. Heuchert
Assignee (at issue)
JAC PRODUCTS, 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.