Patent US3445971A successfully refreshed from Google Patents.
US3445971A
Expired / Lapsed
US
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High pressure vessel hold-together structure
Assignee: Westinghouse Electric Corp
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Filing: 1967-03-02
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Granted: 1969-05-27
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Expires: 1987-03-02
Abstract
No abstract record available.
Inventors
- 👤 Walter E Desmarchais
- 👤 Howard E Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:43
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/08; G21C13/087; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |