US3246586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter control system
Assignee: Eastman Kodak Co
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Filing: 1963-11-27
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Granted: 1966-04-19
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Robert W G Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
G; G03; G03B; G03B33/00; G03B17/00; G03B17/02; G03B17/12; G03B7/00; G03B7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A CAMERA HAVING AN OBJECTIVE LENS FOR FOCUSING AN IMAGE ONTO A PHOTOSENSITIVE MATERIAL OF A GIVEN COLOR TEMPERATURE BALANCE, THE COMBINATION COMPRISING: AT LEAST TWO PHOTOELECTRIC MEANS SENSITIVE TO RADIATION IN DIFFERENT SPECTRAL REGIONS OF THE VISIBLE SPECTRUM AND ADAPTED TO RECEIVE INCIDENT SCENE LIGHT; VARIABLE UNITARY FILTER MEANS MOVABLE INTO THE RAY PATH OF SAID LENS AND RESPONSIVE TO THE OUTPUTS OF EACH OF SAID PHOTOELECTRIC MEANS TO MODIFY THE RATIO OF THE INTENSITIES OF LIGHT IN SAID DIFFERENT SPECTRAL REGIONS PASSING THROUGH SAID LENS, THEREBY MAINTAINING THE AVERAGE SPECTRAL CONTENT OF LIGHT PASSING THROUGH SAID LENS SUBSTANTIALLY CONSTANT AND CORRESPONDING TO THAT FOR WHICH THE PHOTOSENSITIVE MATERIAL HAS BEEN BALANCED; SAID FILTER MEANS COMPRISING A FILTER WEDGE MOVABLE IN THE PATH OF THE LIGHT PASSING THROUGH SAID LENS.
Claim 2
Dependent Claim
132 words
IN A CAMERA HAVING AN OBJECTIVE LENS FOR FOCUSING AN IMAGE ONTO A PHOTOSENSITIVE MATERIAL OF A GIVEN COLOR TEMPERATURE BALANCE, THE COMBINATION COMPRISING: AT LEAST TWO PHOTOELECTRIC MEANS SENSITIVE TO RADIATION IN DIFFERENT SPECTRAL REGIONS OF THE VISIBLE SPECTRUM AND ADAPTED TO RECEIVE INCIDENT SCENE LIGHT; VARIABLE UNITARY FILTER MEANS MOVABLE INTO THE RAY PATH OF SAID LENS AND RESPONSIVE TO THE OUTPUTS OF EACH OF SAID PHOTOELECTRIC MEANS TO MODIFY THE RATIO OF THE INTENSITIES OF LIGHT IN SAID DIFFERENT SPECTRAL REGIONS PASSING THROUGH SAID LENS, THEREBY MAINTAINING THE AVERAGE SPECTRAL CONTENT OF LIGHT PASSING THROUGH SAID LENS SUBSTANTIALLY CONSTANT AND CORRESPONDING TO THAT FOR WHICH THE PHOTOSENSITIVE MATERIAL HAS BEEN BALANCED; SAID FILTER MEANS COMPRISING A FILTER WEDGE MOVABLE IN THE PATH OF THE LIGHT PASSING THROUGH SAID LENS.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |