US2943922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids cooling means and riser conduit
Assignee: Hydrocarbon Research Inc
•
Filing: 1953-04-01
•
Granted: 1960-07-05
•
Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Ludlow S Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/1872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2625467A
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US2542887A
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US2557842A
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US2461104A
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US2493218A
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US2642346A
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US2477502A
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US2672407A
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US2690056A
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US2727810A
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US2756193A
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US2765265A
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US2723180A
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US2838381A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |