US3270639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light intensity control system
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1963-08-06
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Granted: 1966-09-06
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Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 Maurice W Windsor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:59
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; G03B7/00; G03B7/08; G03B7/081; G03B7/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN COMBINATION WITH A PHOTOGRAPHIC CAMERA HAVING A LENS AND NORMALLY ACCOMMODATING A PHOTOGRAPHIC FILM, MEANS SUPPORTED BY THE CAMERA AND BEING FREE OF MEMCHANICALLY MOVING PARTS FOR AUTOMATICALLY REGULATING THE INTENSITY OF LIGHT IMPINGING ON THE PHOTOGRAPHIC FILM, SAID MEANS COMPRISING A PHOTOCHROMIC MEANS THAT IS PROGRESSIVELY RESPONSIVE TO THE INTENSITY OF CERTAIN WAVELENGTHS OF LIGHT RECEIVED BY THE CAMERA TO AUTOMATICALLY REGULATE THE INTENSITY OF CERTAIN OTHER WAVELENGTHS OF LIGHT LYING WITHIN THE SPECTRAL SENSITIVITY RANGE OF THE FILM, THAT ARE APPLIED TO THE FILM, AND MEANS CARRIED BY THE CAMERA FOR ABSORBING LIGHT ENERGY TRANSMITTED THROUGH SAID PHOTOCHROMIC MEANS WHICH IS OF WAVELENGTHS DIFFERENT FROM SAID CERTAIN OTHER WAVELENGTHS AND LYING WITHIN THE SPECTRAL SENSIITIVITY RANGE OF THE FILM.
Claim 2
Dependent Claim
122 words
IN COMBINATION WITH A PHOTOGRAPHIC CAMERA HAVING A LENS AND NORMALLY ACCOMMODATING A PHOTOGRAPHIC FILM, MEANS SUPPORTED BY THE CAMERA AND BEING FREE OF MEMCHANICALLY MOVING PARTS FOR AUTOMATICALLY REGULATING THE INTENSITY OF LIGHT IMPINGING ON THE PHOTOGRAPHIC FILM, SAID MEANS COMPRISING A PHOTOCHROMIC MEANS THAT IS PROGRESSIVELY RESPONSIVE TO THE INTENSITY OF CERTAIN WAVELENGTHS OF LIGHT RECEIVED BY THE CAMERA TO AUTOMATICALLY REGULATE THE INTENSITY OF CERTAIN OTHER WAVELENGTHS OF LIGHT LYING WITHIN THE SPECTRAL SENSITIVITY RANGE OF THE FILM, THAT ARE APPLIED TO THE FILM, AND MEANS CARRIED BY THE CAMERA FOR ABSORBING LIGHT ENERGY TRANSMITTED THROUGH SAID PHOTOCHROMIC MEANS WHICH IS OF WAVELENGTHS DIFFERENT FROM SAID CERTAIN OTHER WAVELENGTHS AND LYING WITHIN THE SPECTRAL SENSIITIVITY RANGE OF THE FILM.
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |