IP Library Patent Application 09827394
Patent Application Utility
App. No. 09/827,394 · Confirmation No. 6366

SPIRAL FIN/TUBE HEAT EXCHANGER

Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362 View Patent ↗ View Publication ↗
⬇ PDF
Code Description Pages PDF
2002-07-25 TRNA Transmittal of New Application 3 View
2002-07-25 DRW Drawings-only black and white line drawings 11 View
2001-04-05 TRNA Transmittal of New Application 3 View
2001-04-05 SPEC Specification 37 View
2001-04-05 CLM Claims 9 View
2001-04-05 ABST Abstract 1 View
2001-04-05 DRW Drawings-only black and white line drawings 11 View
2001-04-05 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
App. No.
09/827,394
Filed
2001-04-05
Granted
2003-08-19
Pub. No.
US20020148600A1
Art Unit
3743
PTA
-387 days