US2720243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bar and tube straightening machine
Assignee: Continental Foundry & Machine
•
Filing: 1951-06-20
•
Granted: 1955-10-11
•
Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 Siegerist Walter Laurenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |