US3743699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for ammonia manufacture
Assignee: Fluor Corp
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Filing: 1971-05-27
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Granted: 1973-07-03
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Expires: 1991-05-27
Abstract
Abstract ORGANIC PHYSICAL SOLVENT REMOVAL OF CARBON DIOXIDE AND OTHER ACID GASES IS ECONOMIC IN AMMONIA MANUFACTURING WHERE THE SHIFT REACTOR EFFLUENT CONTAINING THE ACID GASES AND EXCESS HEAT IS INDIRECTLY HEAT EXCHANGED WITH A CLOSED ABSORPTION REFRIGERATION CYCLE USED TO SUPPLY REFRIGERATION FOR AMMONIA PRODUCTION, IN LIEU OF MECHANICAL COMPRESSION FOR REFRIGERATION.
Inventors
- 👤 M Bogart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0417; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |