Patent US2797771A successfully refreshed from Google Patents.
Patent US2956786A successfully refreshed from Google Patents.
US2956786A
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Superheater support tubes arranged in a row with a manway through the row
Assignee: Babcock and Wilcox Co
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Filing: 1955-12-05
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Granted: 1960-10-18
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Puhr-Westerheide Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:20
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B37/202; F22B37/14; F22B37/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1906633A
Cited
US1935272A
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US2069834A
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US2328039A
Cited
US2346715A
Cited
US2477950A
Cited
US2681641A
Cited
US2754807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |