US2740309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube straightening and bending tool
Assignee: Individual
•
Filing: 1953-05-04
•
Granted: 1956-04-03
•
Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Sr Cecil E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:20
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/05; B21D7/00; B21D7/02; B21D7/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US299615A
Cited
US730549A
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US806085A
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GB191000285A
Cited
US1165779A
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US1285987A
Cited
US1857325A
Cited
US2086974A
Cited
US2127185A
Cited
US2345102A
Cited
US2396182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |