US3245309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-measuring structure for photographic devices
Assignee: Agfa Gevaert NV
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Filing: 1963-03-04
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Granted: 1966-04-12
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Wick Richard
- 👤 Orthmann Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:35
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735; G03B27/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A LIGHT-MEASURING ASSEMBLY FOR A PHOTOGRAPHIC DEVICE, IN COMBINATION, AN OBJECTIVE; LIGHT-DIRECTING MEANS INCLUDING A SOURCE OF LIGHT, SAID LIGHT DIRECTING MEANS POSITIONED AT LEAST IN PART ALONG THE OPTICAL AXIS OF SAID OBJECTIVE FOR DIRECTING LIGHT FROM SAID SOURCE THROUGH SAID OBJECTIVE, AND SAID LIGHT-DIRECTING MEANS ALSO DIRECTING ADDITIONAL LIGHT FROM SAID SOURCE TO THE REGION OF THE OUTER PERIPHERY OF SAID OBJECTIVE IN THE IMMEDIATE VICINITY OF THE LIGHT WHICH PASSES THROUGH SAID OBJECTIVE; A PHOTOCELL LOCATED AT A POSITION SPACED LATERALLY FROM THE OPTICAL AXIS OF SAID OBJECTIVE; AND LIGHT-CONDUCTING MEANS EXTENDING FROM SAID PHOTOCELL INTO THE PATH OF SAID ADDITIONAL LIGHT FOR CONDUCTING AT LEAST SOME OF THE ADDITIONAL LIGHT TO SAID PHOTOCELL WHEREBY THE LATTER MAY PARTICIPATE IN A MEASUREMENT OF THE LIGHT DIRECTED BY SAID LIGH-DIRECTING MEANS THROUGH SAID OBJECTIVE.
Claim 2
Dependent Claim
137 words
IN A LIGHT-MEASURING ASSEMBLY FOR A PHOTOGRAPHIC DEVICE, IN COMBINATION, AN OBJECTIVE; LIGHT-DIRECTING MEANS INCLUDING A SOURCE OF LIGHT, SAID LIGHT DIRECTING MEANS POSITIONED AT LEAST IN PART ALONG THE OPTICAL AXIS OF SAID OBJECTIVE FOR DIRECTING LIGHT FROM SAID SOURCE THROUGH SAID OBJECTIVE, AND SAID LIGHT-DIRECTING MEANS ALSO DIRECTING ADDITIONAL LIGHT FROM SAID SOURCE TO THE REGION OF THE OUTER PERIPHERY OF SAID OBJECTIVE IN THE IMMEDIATE VICINITY OF THE LIGHT WHICH PASSES THROUGH SAID OBJECTIVE; A PHOTOCELL LOCATED AT A POSITION SPACED LATERALLY FROM THE OPTICAL AXIS OF SAID OBJECTIVE; AND LIGHT-CONDUCTING MEANS EXTENDING FROM SAID PHOTOCELL INTO THE PATH OF SAID ADDITIONAL LIGHT FOR CONDUCTING AT LEAST SOME OF THE ADDITIONAL LIGHT TO SAID PHOTOCELL WHEREBY THE LATTER MAY PARTICIPATE IN A MEASUREMENT OF THE LIGHT DIRECTED BY SAID LIGH-DIRECTING MEANS THROUGH SAID OBJECTIVE.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |