US2959158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal steam annulus within pressure shell for hydrocarbon reactor
Assignee: Babcock and Wilcox Co
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Filing: 1957-01-30
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Granted: 1960-11-08
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Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:41
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/22; B; B01; B01J; B01J3/00; B01J3/04; C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; F22B1/02; F22B1/08; B01J2219/00; B01J2219/18; B01J2219/185; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1943
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2397432A
Cited
US2561393A
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US2561394A
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CH265298A
Cited
US2534208A
Cited
US2625140A
Cited
GB689126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |