US3218948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewfinder-rangefinder device for mirror reflex cameras, particularly for motion picture cameras
Assignee: Carl Zeiss AG
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Filing: 1962-07-18
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Granted: 1965-11-23
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kuppenbender Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:26
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B19/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE COMBINATION WITH A MIRROR REFLEX CAMERA, OF A VIEWFINDER-RANGEFINDER DEVICE HAVING A SINGLE OCULAR FOR OBSERVING THE VIEWFINDER AREA AND A REMOVABLE SHARPNESS INDICATOR OF THE COINCIDENCE TYPE ARRANGED IN SAID VIEWFINDER AREA, AND MEANS INCLUDING A MANUALLY OPERABLE CARRIER IN WHICH SAID SHARPNESS INDICATOR IS MOUNTED, SAID CARRIER BEING MOVABLY MOUNTED IN SAID CAMERA FOR SELECTIVELY INSERTING INTO AND REMOVING FROM THE VIEWFINDER LIGHT PATH SAID SHARPNESS INDICATOR, SAID MEANS MOVING THE CARRIER TO A POSITION IN WHICH THE SHARPNESS INDICATOR IS REMOVED FROM THE VIEWFINDER LIGHT PATH AND THE ENTIRE VIEWFINDER IMAGE AREA IS UNOBSTRUCTED BY ANY SHARPNESS INDICATOR.
Claim 2
Dependent Claim
102 words
THE COMBINATION WITH A MIRROR REFLEX CAMERA, OF A VIEWFINDER-RANGEFINDER DEVICE HAVING A SINGLE OCULAR FOR OBSERVING THE VIEWFINDER AREA AND A REMOVABLE SHARPNESS INDICATOR OF THE COINCIDENCE TYPE ARRANGED IN SAID VIEWFINDER AREA, AND MEANS INCLUDING A MANUALLY OPERABLE CARRIER IN WHICH SAID SHARPNESS INDICATOR IS MOUNTED, SAID CARRIER BEING MOVABLY MOUNTED IN SAID CAMERA FOR SELECTIVELY INSERTING INTO AND REMOVING FROM THE VIEWFINDER LIGHT PATH SAID SHARPNESS INDICATOR, SAID MEANS MOVING THE CARRIER TO A POSITION IN WHICH THE SHARPNESS INDICATOR IS REMOVED FROM THE VIEWFINDER LIGHT PATH AND THE ENTIRE VIEWFINDER IMAGE AREA IS UNOBSTRUCTED BY ANY SHARPNESS INDICATOR.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |