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US2767766A
Expired / Lapsed
US
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Tube expander, including a reverse rolling chuck
Assignee: Airetool Manufacturing Co
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Filing: 1953-07-02
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Granted: 1956-10-23
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Expires: 1973-07-02
Abstract
No abstract record available.
Inventors
- 👤 Harold C Mathews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:02
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305808A
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US910416A
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US965286A
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FR477538A
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US1337371A
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US1819915A
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US1881867A
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US2526025A
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US2690205A
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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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |