US3526855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse code modulation and differential pulse code modulation encoders
Assignee: AT&T Inc
•
Filing: 1968-03-18
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Granted: 1970-09-01
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Henry S Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:28
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/30; H03M7/3002; H03M5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2605361A
Cited
US2816267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |