Patent US2615740A successfully refreshed from Google Patents.
US2615740A
Expired / Lapsed
US
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Sealing ring
Assignee: Hamilton Kent Manufacturing Co
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Filing: 1948-09-03
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Granted: 1952-10-28
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Expires: 1968-09-03
Abstract
No abstract record available.
Inventors
- 👤 Tracy D Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:59
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1817774A
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US2188815A
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US2274324A
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US2280183A
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US2356947A
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US2314386A
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US2423122A
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US2448769A
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US2501943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |