Patent US2822109A successfully refreshed from Google Patents.
US2822109A
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Closure for pressure vessels
Assignee: Combustion Engineering Inc
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Filing: 1954-07-13
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Granted: 1958-02-04
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Expires: 1974-07-13
Abstract
No abstract record available.
Inventors
- 👤 Einar E Tangard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:30
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16J13/10; Y; Y10; Y10S; Y10S27/00; Y10S27/01; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE490788C
Cited
US1958273A
Cited
US2192328A
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US2298511A
Cited
US2252488A
Cited
US2352583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |