Patent US2966571A successfully refreshed from Google Patents.
US2966571A
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US
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Method and apparatus for sealing the ends of tubes
Assignee: Babcock and Wilcox Co
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Filing: 1956-09-28
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Granted: 1960-12-27
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Expires: 1976-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Wallace Markert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB385285A
Cited
US2372413A
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US2349835A
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US2470074A
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US2625637A
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US2510207A
Cited
US2649527A
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US2630513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |