US2682775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping mechanism
Assignee: AT&T Inc
•
Filing: 1948-09-28
•
Granted: 1954-07-06
•
Expires: 1968-09-28
Abstract
No abstract record available.
Inventors
- 👤 Frank M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
F; F16; F16H; F16H27/00; F16H27/04; H; H04; H04L; H04L13/00; H04L13/02; H04L13/04; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1523; Y10T74/1558; Y10T74/1565; Y10T74/1576
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US541840A
Cited
US678656A
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US835512A
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DE401158C
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US2201798A
Cited
US2359420A
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US2481115A
Cited
GB596002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |