IP Library › Granted Patent US 6,758,939
Granted Patent Utility
US 6,758,939 · App. 09/943,699

Laminated wear ring

Inventors: David Marquardt, Wayne Lougher, Stephen C. Schultz
Patented Case View Patent ↗
Granted: Jul 6, 2004 Filed: Aug 31, 2001
Inventors
David Marquardt
Wayne Lougher
Stephen C. Schultz
Assignee (at issue)
SpeedFam-IPEC 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 6,758,939
App. No.
09/943,699
Filed
2001-08-31
Granted
2004-07-06
Kind
B2