Patent US3316804A successfully refreshed from Google Patents.
US3316804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating apparatus for photographic printers and enlargers with specular mirrors
Assignee: Simmon Brothers Inc
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Filing: 1965-03-15
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Granted: 1967-05-02
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Louis L Weisglass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:38
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/545; G03B27/547; G03B21/00; G03B21/14; G03B21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ILLUMINATING APPARATUS FOR PHOTOGRAPHIC PRINTERS AND ENLARGERS FOR PRODUCING THROUGHLY MIXED HOMOGENEOUS LIGHT OVER THE SURFACE OF A FILM TRANSPARENCY COMPRISING: (A) A LIGHT COLLECTOR IN THE FORM OF A HOLLOW ELLIPTICAL BODY HAVING A SPECULAR REFLECTING SURFACE AND A LIGHT SOURCE AT ONE END WITH AN OUTLET ORIFICE AT ITS OTHER END, (B) A SPHERICAL MIXING CHAMBER PROVIDED WITH DIFFUSELY REFLECTING INTERIOR SURFACE AND HAVING A LIGHT INLET APERTURE COINCIDING WITH THE LIGHT OUTLET ORIFICE OF SAID LIGHT COLLECTOR AND A LIGHT EXIT APERTURE DISPOSED NORMAL TO ITS LIGHT INLET APERTURE, AND (C) MEANS CARRIED BY SAID SPHERICAL MIXING CHAMBER AND DISPOSED AT AN ACUTE ANGLE RELATIVE TO THE AXIS OF ITS LIGHT INLET APERTURE AND POSITIONED BETWEEN THE LATTER AND THE LIGHT EXIT APERTURE OF SAID SPHERICAL MIXING CHAMBER, AND SAID MEANS BEING THUS ACROSS
Claim 2
Dependent Claim
138 words
AN ILLUMINATING APPARATUS FOR PHOTOGRAPHIC PRINTERS AND ENLARGERS FOR PRODUCING THROUGHLY MIXED HOMOGENEOUS LIGHT OVER THE SURFACE OF A FILM TRANSPARENCY COMPRISING: (A) A LIGHT COLLECTOR IN THE FORM OF A HOLLOW ELLIPTICAL BODY HAVING A SPECULAR REFLECTING SURFACE AND A LIGHT SOURCE AT ONE END WITH AN OUTLET ORIFICE AT ITS OTHER END, (B) A SPHERICAL MIXING CHAMBER PROVIDED WITH DIFFUSELY REFLECTING INTERIOR SURFACE AND HAVING A LIGHT INLET APERTURE COINCIDING WITH THE LIGHT OUTLET ORIFICE OF SAID LIGHT COLLECTOR AND A LIGHT EXIT APERTURE DISPOSED NORMAL TO ITS LIGHT INLET APERTURE, AND (C) MEANS CARRIED BY SAID SPHERICAL MIXING CHAMBER AND DISPOSED AT AN ACUTE ANGLE RELATIVE TO THE AXIS OF ITS LIGHT INLET APERTURE AND POSITIONED BETWEEN THE LATTER AND THE LIGHT EXIT APERTURE OF SAID SPHERICAL MIXING CHAMBER, AND SAID MEANS BEING THUS ACROSS
References Cited (Backward Citations)
US3028483A
Cited
US3135471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |