US3418908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Range finding-focusing apparatus for a photographic camera
Assignee: Polaroid Corp
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Filing: 1966-09-06
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Granted: 1968-12-31
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:04
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A PHOTOGRAPHIC CAMERA HAVING AN EXPOSURE APERTURE ON AN OPTICAL AXIS FOR EXPOSING PHOTOSENSITIVE MATERIALS IN AN IMAGE PLANE WITHIN THE CAMERA, RANGE FINDINGFOCUSING APPARATUS COMPRISING: A PLURALITY OF LENS MEANS OF DIFFERENT FOCAL LENGTH FOR FOCUSING THE IMAGES OF PHOTOGRAPHIC SUBJECTS AT DIFFERENT SUBJECT DISTANCES UPON SAID IMAGE PLANE; MOUNTING MEANS FOR MOUNTING SAID PLURALITY OF LENS MEANS FOR SELECTIVE MOVEMENT ONTO SAID OPTICAL AXIS; RANGE FINDING MEANS FOR INDICATING THE RANGE OF SELECTED PHOTOGRAPHIC SUBJECTS, AND COUPLING MEANS FOR COUPLING SAID MOUNTING MEANS AND SAID RANGE FINDING MEANS SUCH THAT SAID RANGE FINDING MEANS INDICATES WHEN A LENS MEANS CAPABLE OF PROVIDING PROPER FOCUS OF THE IMAGE OF A SUBJECT AT A GIVEN SUBJECT DISTANCE HAS BEEN MOVED INTO AN OPERATIVE POSITION UPON THE OPTICAL AXIS.
Claim 2
Dependent Claim
129 words
IN A PHOTOGRAPHIC CAMERA HAVING AN EXPOSURE APERTURE ON AN OPTICAL AXIS FOR EXPOSING PHOTOSENSITIVE MATERIALS IN AN IMAGE PLANE WITHIN THE CAMERA, RANGE FINDINGFOCUSING APPARATUS COMPRISING: A PLURALITY OF LENS MEANS OF DIFFERENT FOCAL LENGTH FOR FOCUSING THE IMAGES OF PHOTOGRAPHIC SUBJECTS AT DIFFERENT SUBJECT DISTANCES UPON SAID IMAGE PLANE; MOUNTING MEANS FOR MOUNTING SAID PLURALITY OF LENS MEANS FOR SELECTIVE MOVEMENT ONTO SAID OPTICAL AXIS; RANGE FINDING MEANS FOR INDICATING THE RANGE OF SELECTED PHOTOGRAPHIC SUBJECTS, AND COUPLING MEANS FOR COUPLING SAID MOUNTING MEANS AND SAID RANGE FINDING MEANS SUCH THAT SAID RANGE FINDING MEANS INDICATES WHEN A LENS MEANS CAPABLE OF PROVIDING PROPER FOCUS OF THE IMAGE OF A SUBJECT AT A GIVEN SUBJECT DISTANCE HAS BEEN MOVED INTO AN OPERATIVE POSITION UPON THE OPTICAL AXIS.
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |