US3227044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the spectral composition of a light source by the utilization of color control and correcting light filters
Assignee: Eastman Kodak Co
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Filing: 1960-09-23
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Granted: 1966-01-04
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Expires: 1980-09-23
Abstract
No abstract record available.
Inventors
- 👤 Gainer Robert William
- 👤 Edward K Letzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/46; G02; G02B; G02B26/00; G02B26/007; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03C; G03C7/00; G03C7/18; G01J3/50; G01J3/501; G02B26/02; G02B26/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF VARYING THE SPECTRAL COMPOSITION OF A BEAM OF LIGHT CONTAINING COLORS IN AT LEAST THREE REGIONS OF THE SPECTRUM WHICH COMPRISES ADJUSTABLY INSERTING INTO SAID LIGHT BEAM A COLOR CONTROL FILTER WHICH HAS GREATER TRANSMISSION IN AT LEAST ONE OF SAID REGIONS OF THE SPECTRUM AND LESSER TRANSMISSION IN SAID OTHER REGIONS OF THE SPECTRUM IN A GIVEN RATIO TO EACH OTHER, AND KEEPING SUBSTANTIALLY CONSTANT THE RATIO OF THE TRANSMITTED LIGHT INTENSITIES IN THE REGIONS OF SAID LESSER TRANSMISSIONS AS SAID COLOR CONTROL FILTER IS INSERTED INTO SAID BEAM BY VARYING AMOUNTS, INCLUDING FULLY IN AND COMPLETELY OUT OF SAID BEAM, BY MAINTAINING IN THE PART OF SAID LIGHT BEAM NOT INTERCEPTED BY THE COLOR CONTROL FILTER A CORRECTING LIGHT FILTER HAVING GREATER TRANSMISSIONS BUT SUBSTANTIALLY THE SAME TRANSMISSION RATIO IN SAID REGIONS OF LESSER TRANSMISSION AS SAID COLOR CONTROL FILTER.
Claim 2
Independent Claim
145 words
THE METHOD OF VARYING THE SPECTRAL COMPOSITION OF A BEAM OF LIGHT CONTAINING COLORS IN AT LEAST THREE REGIONS OF THE SPECTRUM WHICH COMPRISES ADJUSTABLY INSERTING INTO SAID LIGHT BEAM A COLOR CONTROL FILTER WHICH HAS GREATER TRANSMISSION IN AT LEAST ONE OF SAID REGIONS OF THE SPECTRUM AND LESSER TRANSMISSION IN SAID OTHER REGIONS OF THE SPECTRUM IN A GIVEN RATIO TO EACH OTHER, AND KEEPING SUBSTANTIALLY CONSTANT THE RATIO OF THE TRANSMITTED LIGHT INTENSITIES IN THE REGIONS OF SAID LESSER TRANSMISSIONS AS SAID COLOR CONTROL FILTER IS INSERTED INTO SAID BEAM BY VARYING AMOUNTS, INCLUDING FULLY IN AND COMPLETELY OUT OF SAID BEAM, BY MAINTAINING IN THE PART OF SAID LIGHT BEAM NOT INTERCEPTED BY THE COLOR CONTROL FILTER A CORRECTING LIGHT FILTER HAVING GREATER TRANSMISSIONS BUT SUBSTANTIALLY THE SAME TRANSMISSION RATIO IN SAID REGIONS OF LESSER TRANSMISSION AS SAID COLOR CONTROL FILTER.
References Cited (Backward Citations)
US1830637A
Cited
US2213382A
Cited
US2272646A
Cited
FR1066515A
Cited
US3083614A
Cited
FR1228775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |