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Patent US3298773A successfully refreshed from Google Patents.
US3298773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure controls for motion picture cameras
Assignee: Agfa Gevaert NV
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Filing: 1964-09-17
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Granted: 1967-01-17
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Expires: 1984-09-17
Abstract
No abstract record available.
Inventors
- 👤 Auracher August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:20
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
IN A MOTION PICTURE CAMERA, IN COMBINATION, MOVING COIL MEANS ADAPTED TO BE CONNECTED WITH A DIAPHRAGM OF THE CAMERA FOR ADJUSTING THE DIAPHRAGM; AN ELECTRICAL CIRCUIT ELECTRICALLY CONNECTING A PHOTOSENSITIVE RESISTOR AND A SOURCE OF CURRENT TO SAID MOVING COIL INSTRUMENT FOR ACTUATING THE LATTER ACCORDING TO THE INTENSITY OF LIGHT IMPINGING ON SAID RESISTOR; A PAIR OF VARIABLE RESISTORS RESPECTIVELY CONNECTED IN SERIES AND IN PARALLEL WITH SAID CIRCUIT FOR RESPECTIVELY PROVIDING AN OVEREXPOSURE AND AN UNDEREXPOSURE; AND SINGLE MANUALLY OPERABLE MEANS OPERATIVELY CONNECTED WITH BOTH OF SAID RESISTORS FOR OPTIONALLY CONNECTING A SELECTED ONE OF SAID VARIABLE RESISTORS INTO SAID CIRCUIT WHILE SIMULTANEOUSLY DISCONNECTING THE OTHER OF SAID VARIABLE RESISTORS FROM SAID CIRCUIT, SO THAT THE OPERATOR CAN PROVIDE INTENTIONALLY EITHER AN OVEREXPOSURE OR AN UNDEREXPOSURE.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |