IP Library › Patent Application 09937821
Patent Application Utility PCT National Stage
App. No. 09/937,821 · Confirmation No. 7066

PROCESS AND PLANT FOR PRODUCING ARGON BY CRYOGENIC DISTILLATION

Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362 View Patent ↗
⬇ PDF
 Code Description Pages PDF
2001-09-28 ABST Abstract 2 View
2001-09-28 LET. Miscellaneous Incoming Letter 17 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.
09/937,821
Filed
2001-09-28
Granted
2003-06-10
Art Unit
3744
PTA
0 days