US2727103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Click eliminating means for threeposition type keys
Assignee: AT&T Inc
•
Filing: 1953-04-24
•
Granted: 1955-12-13
•
Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Charles C Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:12
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; H01H1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2261809A
Cited
US2427187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |