US2814508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal and segmented external pipe coupling sleeves with fluid pressure seal
Assignee: Individual
•
Filing: 1955-10-19
•
Granted: 1957-11-26
•
Expires: 1975-10-19
Abstract
No abstract record available.
Inventors
- 👤 Seamark Lewis Mervyn Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US180781A
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US1016878A
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US2092358A
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US2542701A
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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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |