US2495683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system
Assignee: AT&T Inc
•
Filing: 1940-12-24
•
Granted: 1950-01-31
•
Expires: 1960-12-24
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105920A
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US1370669A
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US1864303A
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US2122367A
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US2023952A
Cited
US2193967A
Cited
US2174731A
Cited
US2193810A
Cited
US2165780A
Cited
US2143828A
Cited
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 |