IP Library Granted Patent US 6,727,470
Granted Patent Utility Small
US 6,727,470 · Confirmation No. 9859

IMPEDANCE HEATING FOR RAILROAD TRACK SWITCH

Inventor: David L. Reichle
⬇ PDF
Code Description Pages PDF
2004-03-08 IFEE Issue Fee Payment (PTO-85B) 1 View
2004-03-08 LET. Miscellaneous Incoming Letter 1 View
2004-03-08 DRW Drawings-only black and white line drawings 9 View
2003-07-08 RETMAIL Mail returned to USPTO as undelivered 7 View
2002-02-07 TRNA Transmittal of New Application 5 View
2002-02-07 SPEC Specification 21 View
2002-02-07 CLM Claims 4 View
2002-02-07 ABST Abstract 1 View
2002-02-07 DRW Drawings-only black and white line drawings 8 View
2002-02-07 OATH Oath or Declaration filed 3 View
Monitor This Case
Get email alerts when status or documents change.
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 application's details
Quick Facts
Patent No.
US 6,727,470
App. No.
10/071,567
Filed
2002-02-07
Granted
2004-04-27
Pub. No.
US20030146207A1
Art Unit
3742
PTA
-117 days