Patent US2857177A successfully refreshed from Google Patents.
US2857177A
Expired / Lapsed
US
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Plural ball and socket flexible sealed coupling for high temperature gas conduits
Assignee: FORMED TUBES Inc
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Filing: 1954-12-29
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Granted: 1958-10-21
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Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Henry F Loetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/1004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2085922A
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US2187880A
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US2183296A
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US2206414A
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US2369849A
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US2565737A
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US2672359A
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US2679409A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |