IP Library › Granted Patent US 5,810,447
Granted Patent Utility
US 5,810,447 · App. 08/530,748

Apparatus and method for continuous mining

Inventors: David A. Christopher, Larry G. Offutt
Patented Case View Patent ↗
Granted: Sep 22, 1998 Filed: Sep 19, 1995
Inventors
David A. Christopher
Larry G. Offutt
Assignee (at issue)
Arch Mineral 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 5,810,447
App. No.
08/530,748
Filed
1995-09-19
Granted
1998-09-22
Kind
A