US3539298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen from carbon monoxide and water under liquid phase reaction conditions in the presence of a basic nitrogen compound
Assignee: Union Oil Company of California
•
Filing: 1969-05-05
•
Granted: 1970-11-10
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Expires: 1989-05-05
Abstract
No abstract record available.
Inventors
- 👤 Donald M Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:59
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/12; C01B3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1843540A
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US2829113A
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US3271110A
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US3251652A
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US3382044A
Cited
US3397962A
Cited
US3418082A
Cited
US3410661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |