US2924711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilevel quantizer
Assignee: AT&T Inc
•
Filing: 1956-11-21
•
Granted: 1960-02-09
•
Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Kretzmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:34
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/0602; H03M1/12; H03M1/34; H03M1/36; H03M1/361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733410A
Cited
US2486391A
Cited
US2701303A
Cited
US2725530A
Cited
US2773980A
Cited
US2602918A
Cited
US2686869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |