US1904593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of gas rich in free hydrogen
Assignee: Standard Oil Development Co
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Filing: 1932-09-17
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Granted: 1933-04-18
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Expires: 1952-09-17
Abstract
No abstract record available.
Inventors
- 👤 Philip L Young
- 👤 William V Hanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:58
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; C01B3/48; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/0283; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/0475; C01B2203/048; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0816; C01B2203/085; C01B2203/0866; C01B2203/0872; C01B2203/0877; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1094; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/1258; C01B2203/1264; C01B2203/127; C01B2203/1288; C01B2203/14; C01B2203/146; C01B2203/147; C01B2203/148; C01B2203/80; C01B2203/82
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) | 1936-04-17 | 1936-10-17 | 1937-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-17 | 1940-10-17 | 1941-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-17 | 1944-10-17 | 1945-04-18 | $7700.00 | Window Closed / Lapsed |