US3449084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining for secondary ammonia reformer
Assignee: Dresser Industries Inc
•
Filing: 1966-04-20
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Granted: 1969-06-10
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Expires: 1986-04-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas William Smoot
- 👤 George D Cobaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:03
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/0242; B01J8/025; B01J3/00; B01J3/002; B01J8/0285; C; C01; C01B; C01B3/00; C01B3/02; C01B3/025; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00477; B01J2208/00495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |