Patent US2974706A successfully refreshed from Google Patents.
US2974706A
Expired / Lapsed
US
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Rotary bending machine having hydraulic means for holding movable pressure die against stock
Assignee: Wallace Supplies Manufacturing Co
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Filing: 1957-02-26
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Granted: 1961-03-14
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Witt Edward J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:35
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/05; B21D9/07; B21D9/073
Claims Analysis
Total Claims: 0
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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) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |