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Patent US2957946A successfully refreshed from Google Patents.
US2957946A
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Speech interpolation system
Assignee: AT&T Inc
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Filing: 1958-09-23
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Granted: 1960-10-25
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Expires: 1978-09-23
Abstract
No abstract record available.
Inventors
- 👤 Kolding Aaron Robert
- 👤 George N Packard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2541932A
Cited
US2754367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |