US3457761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for drawing and stretching a flat blank into a tubular shell
Assignee: AT&T Inc
•
Filing: 1967-03-20
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Granted: 1969-07-29
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Fritz V Brosseit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:10
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/206; H; H01; H01R; H01R43/00; H01R43/16
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |