Patent US2809853A successfully refreshed from Google Patents.
US2809853A
Expired / Lapsed
US
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Pipe and socket with flexible lip gasket
Assignee: Hamilton Kent Manufacturing Co
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Filing: 1954-03-31
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Granted: 1957-10-15
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Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Tracy D Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:50
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/03; F16L17/035; F16L17/025; F16L21/00; F16L21/02; F16L21/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690047A
Cited
US2210833A
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US2165052A
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US2226067A
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US2277922A
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US2506069A
Cited
US2615741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |