IP Library Granted Patent US 4,609,028
Granted Patent Utility
US 4,609,028 · App. 06/622,718

Evaporative pattern assembly for use in sand casting

Inventor: Russell J. VanRens
Patented Case View Patent ↗
Granted: Sep 2, 1986 Filed: Jun 20, 1984
Inventor
Russell J. VanRens
Assignee (at issue)
Outboard Marine 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,609,028
App. No.
06/622,718
Filed
1984-06-20
Granted
1986-09-02
Kind
A