Patent US3085468A successfully refreshed from Google Patents.
US3085468A
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Dichroic filter color balance systems
Assignee: Individual
•
Filing: 1959-01-21
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Granted: 1963-04-16
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Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Lester C Hehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:03
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; F; F21; F21V; F21V9/00; F21V9/40; G03; G03B; G03B27/00; G03B27/72; G03B27/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A VARIABLE HUE, SUBSTANTIALLY CONSTANT COLOR SATURATION, DICHROIC FILTER COLOR BALANCE SYSTEM FOR PHOTOGRAPHIC REPRODUCTION COMPRISING, IN COMBINATION; A LIGHT SOURCE; A SUPPORTING FRAME; A PLURALITY OF DICHROIC INTERFERENCE FILTERS IN SERIES, EACH HAVING THE PROPERTY OF SHIFTING ITS SPECTRAL REFLECTION AND SPECTRAL TRANSMISSION WITH A CHANGE IN THE ANGULARITY OF THE INCIDENCE OF LIGHT FROM SAID LIGHT SOURCE; PIVOTAL MEANS CONNECTING EACH OF SAID DICHROIC INTERFERENCE FILTERS WITH SAID SUPPORTING FRAME; MEANS FOR ROTATING EACH OF SAID DICHROIC INTERFERENCE FILTERS ABOUT SAID PIVOTAL MEANS TO THEREBY CHANGE THE FREQUENCY OF THE WAVES OF LIGHT WHICH ARE TRANSMITTED THROUGH SAID FILTERS; AND A PORTION OF THE LIGHT FROM SAID SOURCE PASSING THROUGH SAID DICHROIC INTERFERENCE FILTERS AND THROUGH FILM TO A LIGHT SENSITIVE SURFACE.
Claim 2
Dependent Claim
124 words
A VARIABLE HUE, SUBSTANTIALLY CONSTANT COLOR SATURATION, DICHROIC FILTER COLOR BALANCE SYSTEM FOR PHOTOGRAPHIC REPRODUCTION COMPRISING, IN COMBINATION; A LIGHT SOURCE; A SUPPORTING FRAME; A PLURALITY OF DICHROIC INTERFERENCE FILTERS IN SERIES, EACH HAVING THE PROPERTY OF SHIFTING ITS SPECTRAL REFLECTION AND SPECTRAL TRANSMISSION WITH A CHANGE IN THE ANGULARITY OF THE INCIDENCE OF LIGHT FROM SAID LIGHT SOURCE; PIVOTAL MEANS CONNECTING EACH OF SAID DICHROIC INTERFERENCE FILTERS WITH SAID SUPPORTING FRAME; MEANS FOR ROTATING EACH OF SAID DICHROIC INTERFERENCE FILTERS ABOUT SAID PIVOTAL MEANS TO THEREBY CHANGE THE FREQUENCY OF THE WAVES OF LIGHT WHICH ARE TRANSMITTED THROUGH SAID FILTERS; AND A PORTION OF THE LIGHT FROM SAID SOURCE PASSING THROUGH SAID DICHROIC INTERFERENCE FILTERS AND THROUGH FILM TO A LIGHT SENSITIVE SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |