Granted Patent
Utility
US 4,210,617 · App. 05/930,785
Method of casting an integral slide gate and nozzle
Inventor:
Jan Bowman
Patented Case
View Patent ↗
Granted: Jul 1, 1980
Filed: Aug 3, 1978
Inventor
Jan Bowman
Assignee (at issue)
Kaiser Aluminum & Chemical 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.