Patent US2923771A successfully refreshed from Google Patents.
US2923771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television program rating and recording apparatus
Assignee: AT&T Inc
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Filing: 1957-10-07
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Granted: 1960-02-02
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Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Robert C Avery
- 👤 Frank E Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/38; H04H60/41; H04H60/43; H04H60/76; H04H60/81; H04H60/93; H04H60/94; H04H20/00; H04H20/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |