US2688588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for handling gas-particle mixtures in the catalytic conversion of hydrocarbons
Assignee: Deep Rock Oil Corp
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Filing: 1950-05-03
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Granted: 1954-09-07
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Expires: 1970-05-03
Abstract
No abstract record available.
Inventors
- 👤 Jon W Beam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:23
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188768A
Cited
GB174788A
Cited
US1994899A
Cited
US2515155A
Cited
US2419088A
Cited
US2435158A
Cited
US2509983A
Cited
US2517900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |