Patent US2817702A successfully refreshed from Google Patents.
US2817702A
Expired / Lapsed
US
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Feedback intensity control for continuous film scanner
Assignee: AT&T Inc
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Filing: 1951-10-12
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Granted: 1957-12-24
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Expires: 1971-10-12
Abstract
No abstract record available.
Inventors
- 👤 Robert E Graham
- 👤 Charles F Mattke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:22
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/36; H04N3/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2204427A
Cited
GB483935A
Cited
US2188679A
Cited
GB518311A
Cited
US2199608A
Cited
US2251608A
Cited
US2288096A
Cited
US2604534A
Cited
US2523296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |