US2850071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stretchforming metal and controlling direction of pull
Assignee: Individual
•
Filing: 1954-10-18
•
Granted: 1958-09-02
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Daniel W Kraybill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:57
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/02; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1156062A
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US1264248A
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US1431175A
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US1968010A
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US2269549A
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US2379658A
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US2347575A
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US2334520A
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US2431173A
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US2446089A
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US2553092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |