US3539292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-iron process for ammonia synthesis gas production
Assignee: Consolidation Coal Co
•
Filing: 1968-03-07
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Granted: 1970-11-10
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Expires: 1988-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jack Huebler
- 👤 James L Johnson
- 👤 Frank C Schora Jr
- 👤 Paul B Tarman
- 👤 Peter S Panos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:38
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/061; C01B3/025; C01B3/08; C01B3/10; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |