US2830642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for forming tabs on cylindrical shell by cutting and bending
Assignee: AT&T Inc
•
Filing: 1956-01-25
•
Granted: 1958-04-15
•
Expires: 1976-01-25
Abstract
No abstract record available.
Inventors
- 👤 Wallberg Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:21
CPC Classifications
H; H05; H05K; H05K13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US822755A
Cited
US1134507A
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US1766661A
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US1836497A
Cited
US2070032A
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US2473836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |