US2783678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic contrast control system
Assignee: Technicolor Motion Picture Corp
•
Filing: 1951-10-02
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Granted: 1957-03-05
•
Expires: 1971-10-02
Abstract
No abstract record available.
Inventors
- 👤 John M Andreas
- 👤 Donald H Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US603936A
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US2152353A
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US1959498A
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US2131501A
Cited
US2501446A
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US2480425A
Cited
US2480423A
Cited
US2543706A
Cited
US2641963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |