US2495682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system
Assignee: AT&T Inc
•
Filing: 1938-12-30
•
Granted: 1950-01-31
•
Expires: 1958-12-30
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bacon
- 👤 Edward F Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/08; H04L; H04L12/00; H04L12/54
Claims Analysis
Total Claims: 0
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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) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |