US3388968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia synthesis feed and recycle loop
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-12-01
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Granted: 1968-06-18
•
Expires: 1985-12-01
Abstract
No abstract record available.
Inventors
- 👤 Spielman Maurice
- 👤 George P Baumann
- 👤 Hering Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0204; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0476; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |