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US2837353A
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Thin-wall pipe coupling with pressure actuated locking gasket
Assignee: HENRY T CHAMBERLAIN
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Filing: 1954-02-03
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Granted: 1958-06-03
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Clifford L Ashbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:23
CPC Classifications
F; F16; F16L; F16L49/00; F16L49/06; F16L19/00; F16L19/06; F16L47/00; F16L47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US865497A
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US906849A
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US1282959A
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US1959630A
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US1888539A
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US2046597A
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US2226304A
Cited
US2470883A
Cited
US2562359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |