Granted Patent
Utility
US 6,079,972 · App. 09/218,637
Injection molding cooling core having spiral grooves
Inventor:
Jobst U. Gellert
Patented Case
View Patent ↗
Granted: Jun 27, 2000
Filed: Dec 22, 1998
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.