US3010202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming thin metal panels having bifurcated edges
Assignee: Calumet and Hecla Inc
•
Filing: 1958-03-10
•
Granted: 1961-11-28
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Howard A Fromson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; B21D39/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US677986A
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US1771386A
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US1884440A
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US2045025A
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US2690002A
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US2887762A
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US2740188A
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US2836884A
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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) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |