US2439760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing pipe coupling
Assignee: Sterling Industries Ltd
•
Filing: 1945-05-31
•
Granted: 1948-04-13
•
Expires: 1965-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas Percival Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
F; F16; F16L; F16L29/00; F16L29/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87925; Y10T137/87941; Y10T137/87949
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US794499A
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US1315018A
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US1830118A
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US2243930A
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US2135222A
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US2254997A
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US2204507A
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US2326998A
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US2304390A
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US2311239A
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US2365752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |