US2790299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for twisting wires
Assignee: AT&T Inc
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Filing: 1955-08-22
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Granted: 1957-04-30
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Gillis Randall
- 👤 Elbert W Larson
- 👤 Ralph M Stine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:57
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/02; H01B13/0235; D; D07; D07B; D07B3/00; D07B3/005; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |