US3432265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia production process
Assignee: Foster Wheeler Inc
•
Filing: 1967-04-13
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Granted: 1969-03-11
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Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mccallister
- 👤 Alan M Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:02
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/48; C01B3/025; C01B3/36; C01B3/50; C01B2203/00; C01B2203/02; C01B2203/025; C01B2203/0283; C01B2203/0288; C01B2203/04; C01B2203/0415; C01B2203/0435; C01B2203/045; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/0485; C01B2203/0495; C01B2203/06; C01B2203/068; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0822; C01B2203/0827; C01B2203/0872; C01B2203/0883; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1247; C01B2203/14; C01B2203/146; C01B2203/147; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |