US2516752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coding tube for pulse code modulation signals
Assignee: AT&T Inc
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Filing: 1948-09-30
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Granted: 1950-07-25
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Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carbrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:44
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H03; H03M; H03M1/00; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/044; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2108097A
Cited
US2180944A
Cited
US2179205A
Cited
US2289205A
Cited
US2451484A
Cited
US2449339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |