US2825583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupler with shut-off valve
Assignee: Shell Development Co
•
Filing: 1954-05-24
•
Granted: 1958-03-04
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Lamb John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:21
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/30; F16L37/08; F16L37/12; F16L37/1205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1064862A
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US1493306A
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FR555640A
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US2048388A
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US2348478A
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US2383249A
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US2409753A
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US2396880A
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US2518299A
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US2444451A
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US2634927A
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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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |