US2431173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stretch-shaping metal blanks to conform to convex curved dies
Assignee: TW and CB Sheridan Co
•
Filing: 1943-01-29
•
Granted: 1947-11-18
•
Expires: 1963-01-29
Abstract
No abstract record available.
Inventors
- 👤 Hawkes Thomas Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:24
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/02; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068
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) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |