US3331960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable photogrpahic light
Assignee: GTE Sylvania Inc
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Filing: 1964-11-27
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Granted: 1967-07-18
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 William B Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:34
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A REFLECTOR FOR DIRECTING LIGHT OVER A SUBSTANTIALLY RECTANGULAR AREA, SAID REFLECTOR BEING OTHER THAN A SURFACE OF REVOLUTION AND COMPRISING A MAIN QUASI-PARABOLOIDAL PORTION HAVING FOUR TAPERED, FORWARDLY-EXTENDING FINGERS BETWEEN WHICH ARE REFLECTING FLARES OF CURVATURE SUFFICIENTLY DIFFERENT FROM THAT OF THE MAIN REFLECTOR TO REFLECT LIGHT ONTO THE RECTANGULAR PATTERN, THE FLARES ON OPPOSITE SIDES BEING SUBSTANTIALLY IDENTICAL WITH EACH OTHER, SAID FLARES EACH BEING SUBSTANTIALLY CONICAL IN THEIR CENTER REGION AND BLENDING TO PARABOLOIDAL AT THEIR EDGES, THE PARABOLOIDAL PORTIONS OF THE FLARES HAVING SHORTER FOCUS THAN THAT OF THE MAIN PARABOLOIDAL SECTION.
Claim 2
Dependent Claim
96 words
A REFLECTOR FOR DIRECTING LIGHT OVER A SUBSTANTIALLY RECTANGULAR AREA, SAID REFLECTOR BEING OTHER THAN A SURFACE OF REVOLUTION AND COMPRISING A MAIN QUASI-PARABOLOIDAL PORTION HAVING FOUR TAPERED, FORWARDLY-EXTENDING FINGERS BETWEEN WHICH ARE REFLECTING FLARES OF CURVATURE SUFFICIENTLY DIFFERENT FROM THAT OF THE MAIN REFLECTOR TO REFLECT LIGHT ONTO THE RECTANGULAR PATTERN, THE FLARES ON OPPOSITE SIDES BEING SUBSTANTIALLY IDENTICAL WITH EACH OTHER, SAID FLARES EACH BEING SUBSTANTIALLY CONICAL IN THEIR CENTER REGION AND BLENDING TO PARABOLOIDAL AT THEIR EDGES, THE PARABOLOIDAL PORTIONS OF THE FLARES HAVING SHORTER FOCUS THAN THAT OF THE MAIN PARABOLOIDAL SECTION.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |