US2714864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for forming a helically wound tube
Assignee: Armco Inc
•
Filing: 1951-11-30
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Granted: 1955-08-09
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 James E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US375435A
Cited
US1939581A
Cited
US1968365A
Cited
US1976686A
Cited
GB482413A
Cited
US2237309A
Cited
US2185337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |