IP Library Granted Patent US 6,640,752
Granted Patent Utility
US 6,640,752 · Confirmation No. 2090

BOILER AND REGENERATIVE AIR PREHEATER ARRANGEMENT TO ENHANCE SO3 CAPTURE

Patented Case View Patent ↗
⬇ PDF
Code Description Pages PDF
2015-01-07 C.AD Change of Address 1 View
2015-01-07 N417 Electronic Filing System Acknowledgment Receipt 2 View
2003-08-18 IFEE Issue Fee Payment (PTO-85B) 1 View
2003-08-18 LET. Miscellaneous Incoming Letter 1 View
2003-07-18 LET. Miscellaneous Incoming Letter 1 View
2003-07-18 DRW Drawings-only black and white line drawings 4 View
2003-03-07 TRNA Transmittal of New Application 1 View
2003-03-07 SPEC Specification 9 View
2003-03-07 CLM Claims 5 View
2003-03-07 ABST Abstract 1 View
2003-03-07 DRW Drawings-only black and white line drawings 4 View
2003-03-07 OATH Oath or Declaration filed 2 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 6,640,752
App. No.
10/383,931
Filed
2003-03-07
Granted
2003-11-04
Art Unit
3749
PTA
-120 days