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US2475641A
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Prompting system
Assignee: JOHN ARCHER CARTER
•
Filing: 1946-10-29
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Granted: 1949-07-12
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Expires: 1966-10-29
Abstract
No abstract record available.
Inventors
- 👤 Rosenberg Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/2222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1219682A
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US1384014A
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US2070112A
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US2101785A
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US2319627A
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US2400066A
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US2363583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |