Patent US3274884A successfully refreshed from Google Patents.
US3274884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic film viewing apparatus
Assignee: FMC Corp
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Filing: 1961-05-29
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Granted: 1966-09-27
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Charles H Sortor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
APPARATUS FOR VIEWING STEREOSCOPIC PHOTOGRAPHIC SCENES HAVING ADJOINING EDGES AND DISPOSED IN THE ORDER IN WHICH THEY WERE EXPOSED IN THE CAMERA, COMPRISING MEANS FOR SUPPORTING ADJOINING SCENES FOR VIEWING, MEANS FOR ILLUMINATING THE SCENES, MEANS FOR CROSSING THE BEAMS OF LIGHT EMANATING DIRECTLY FROM THE SCENES COMPRISING A PAIR OF PRISMS, SAID PRISMS FORMING ISOSCELES TRIANGLES HAVING COPLANAR APICES, THE PLANES OF THE BASES OF SAID PRISMS BEING SPACED FROM BUT PARALLEL TO ONE ANOTHER, THE APICES OF SAID PRISMS LYING IN A PLANE THAT SUBSTANTIALLY INTERSECTS THE MIDLINE BETWEEN THE SCENES, AND A SINGLE CONVERGING LENS FACING THE APEX OF THE PRISM THAT IS REMOTE FROM SAID SCENE SUPPORTING MEANS, SAID SCENE SUPPORTING MEANS BEING INSIDE OF THE PRINCIPAL FOCUS OF SAID LENS, SAID LENS FORMING VIRTUAL IMAGES OF THE CROSSED BEAMS OF LIGHT EMANATING DIRECTLY FROM THE SCENES IN ORDER THAT THE SCENES CAN BE VIEWED STEREOSCOPICALLY.
Claim 2
Dependent Claim
150 words
APPARATUS FOR VIEWING STEREOSCOPIC PHOTOGRAPHIC SCENES HAVING ADJOINING EDGES AND DISPOSED IN THE ORDER IN WHICH THEY WERE EXPOSED IN THE CAMERA, COMPRISING MEANS FOR SUPPORTING ADJOINING SCENES FOR VIEWING, MEANS FOR ILLUMINATING THE SCENES, MEANS FOR CROSSING THE BEAMS OF LIGHT EMANATING DIRECTLY FROM THE SCENES COMPRISING A PAIR OF PRISMS, SAID PRISMS FORMING ISOSCELES TRIANGLES HAVING COPLANAR APICES, THE PLANES OF THE BASES OF SAID PRISMS BEING SPACED FROM BUT PARALLEL TO ONE ANOTHER, THE APICES OF SAID PRISMS LYING IN A PLANE THAT SUBSTANTIALLY INTERSECTS THE MIDLINE BETWEEN THE SCENES, AND A SINGLE CONVERGING LENS FACING THE APEX OF THE PRISM THAT IS REMOTE FROM SAID SCENE SUPPORTING MEANS, SAID SCENE SUPPORTING MEANS BEING INSIDE OF THE PRINCIPAL FOCUS OF SAID LENS, SAID LENS FORMING VIRTUAL IMAGES OF THE CROSSED BEAMS OF LIGHT EMANATING DIRECTLY FROM THE SCENES IN ORDER THAT THE SCENES CAN BE VIEWED STEREOSCOPICALLY.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |