Patent US3354776A successfully refreshed from Google Patents.
US3354776A
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Assignee: Bell and Howell Co
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Filing: 1964-11-20
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Granted: 1967-11-28
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Expires: 1984-11-20
Abstract
No abstract record available.
Inventors
- 👤 Louis A Smitzer
- 👤 Andrew I Yohana
- 👤 Daniel D Call
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:34
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A MICROFILM READER COMPRISING A CABINET HAVING A VERTICALLY DISPOSED SCREEN FOR VIEWING AN IMAGE, A LIGHT SOURCE IN SAID CABINET, AND AN OPTICAL TRACK BETWEEN SAID SCREEN AND SAID LIGHT SOURCE COMPRISING LENS SYSTEM FOR VARYING THE MAGNIFICATION OF THE IMAGE WHILE MAINTAINING PRECISION FOCUS COMPRISING CONTINUOUSLY VARIABLE MAGNIFICATION ZOOM LENSES CONTINUOUSLY ADJUSTABLE AXIALLY AND MEANS FOR AXIALLY ADJUSTING SAID LENSES FOR VARIABLE MAGNIFICATION BETWEEN 20X AND 40X, AND A NO-REWIND CARTRIDGE FOR INSERTING A ROLL FILM INTO PROJECTING RELATION WITH THE OPTICAL TRACK, SAID CARTRIDGE COMPRISING AN INTEGRAL CONTAINER HAVING UPPER, LOWER AND SIDE WALLS AND INCLUDING TWO HUBS SPACED APART LESS THAN TWICE THE RADIAL DIMENSION OF THE ACCUMULATED FILM AND HAVING MEANS FORMING A FILM PLANE APERTURE THROUGH WHICH THE FILM PASSES FROM ONE HUB TO THE OTHER.
Claim 2
Dependent Claim
132 words
A MICROFILM READER COMPRISING A CABINET HAVING A VERTICALLY DISPOSED SCREEN FOR VIEWING AN IMAGE, A LIGHT SOURCE IN SAID CABINET, AND AN OPTICAL TRACK BETWEEN SAID SCREEN AND SAID LIGHT SOURCE COMPRISING LENS SYSTEM FOR VARYING THE MAGNIFICATION OF THE IMAGE WHILE MAINTAINING PRECISION FOCUS COMPRISING CONTINUOUSLY VARIABLE MAGNIFICATION ZOOM LENSES CONTINUOUSLY ADJUSTABLE AXIALLY AND MEANS FOR AXIALLY ADJUSTING SAID LENSES FOR VARIABLE MAGNIFICATION BETWEEN 20X AND 40X, AND A NO-REWIND CARTRIDGE FOR INSERTING A ROLL FILM INTO PROJECTING RELATION WITH THE OPTICAL TRACK, SAID CARTRIDGE COMPRISING AN INTEGRAL CONTAINER HAVING UPPER, LOWER AND SIDE WALLS AND INCLUDING TWO HUBS SPACED APART LESS THAN TWICE THE RADIAL DIMENSION OF THE ACCUMULATED FILM AND HAVING MEANS FORMING A FILM PLANE APERTURE THROUGH WHICH THE FILM PASSES FROM ONE HUB TO THE OTHER.
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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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |