US1736065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hydrogen
Assignee: Du Pont Ammonia Corp
•
Filing: 1926-08-05
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Granted: 1929-11-19
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Expires: 1946-08-05
Abstract
No abstract record available.
Inventors
- 👤 Williams Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:46
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/386; C01B3/40; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/025; C01B2203/0261; C01B2203/08; C01B2203/0805; C01B2203/0838; C01B2203/0844; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1094; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/14; C01B2203/142
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) | 1932-11-18 | 1933-05-20 | 1933-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-18 | 1937-05-20 | 1937-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-18 | 1941-05-20 | 1941-11-19 | $7700.00 | Window Closed / Lapsed |