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US2657446A
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Assignee: Individual
•
Filing: 1951-07-09
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Granted: 1953-11-03
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Expires: 1971-07-09
Abstract
No abstract record available.
Inventors
- 👤 Tom R Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:26
CPC Classifications
F; F16; F16B; F16B45/00; F16B45/02; F16B45/024; F16B45/026; F16B45/023; F16B45/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US158220A
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US281857A
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GB191116783A
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US1219942A
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US1263099A
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US2116880A
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US2166666A
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US2197997A
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US2490931A
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |