US3257553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire
Assignee: General Electric Co
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Filing: 1964-04-30
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Granted: 1966-06-21
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Tolbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:42
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; F21V; F21V7/00; F21V7/04; F21V7/09; F21W; F21W2131/00; F21W2131/10; F21W2131/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A LUMINAIRE ADAPTED TO BE MOUNTED ADJACENT THE INTERSECTION OF FOUR ROADWAYS COMPRISING, IN COMBINATION, AN ELONGATED INVERTED OVATE REFLECTOR HAVING AN OPEN BOTTOM AND ROM EXTENDING IN A PLANE, A LAMP COMPRISING AN ELONGATED BULB HAVING A BASE MOUNTED AT ONE END OF SAID REFLECTOR AND EXTENDING THEREIN TOWARD THE OTHER END THEREOF ABOVE THE PLANE OF SAID RIM, SAID LAMP HAVING A LIGHT CENTER, SAID REFLECTOR BEING FORMED ON ITS INTERIOR SURFACES ON OPPOSITE SIDES WITH A PLURALITY OF REFLECTING SURFACES ARRANGED IN STEPS ALONG THE LENGTH OF SAID REFLECTOR, EACH REFLECTING SURFACE BEING ELONGATED FROM SAID RIM TOWARD THE TOP SAID REFLECTOR, SAID STEPPED REFLECTING SURFACES BEING ARRANGED IN FOUR GROUPS EACH COMPRISING A PLURALLITY OF REFLECTING SURFACES AND LOCATED RESPECTIVELY IN QUADRANTS FORMED BY THE LONGITUDINAL MEDIAN PLANE OF SAID REFLECTOR INTERSECING A TRANSVERSE PLANE NORMAL THERETO PASSING THROUGH SAID LIGHT CENTER, SAID STEPPED REFLECTING SURFACES BEING PARABOLIDAL IN BOTH HORIZONTAL AND VERTICAL CROSS SECTION, THE OPTICAL AXES OF THE REFLECTING SURFACES IN ADJACENT GROUPS BEING APPROXIMATELY AT RIGHT ANGLES.
Claim 2
Dependent Claim
174 words
A LUMINAIRE ADAPTED TO BE MOUNTED ADJACENT THE INTERSECTION OF FOUR ROADWAYS COMPRISING, IN COMBINATION, AN ELONGATED INVERTED OVATE REFLECTOR HAVING AN OPEN BOTTOM AND ROM EXTENDING IN A PLANE, A LAMP COMPRISING AN ELONGATED BULB HAVING A BASE MOUNTED AT ONE END OF SAID REFLECTOR AND EXTENDING THEREIN TOWARD THE OTHER END THEREOF ABOVE THE PLANE OF SAID RIM, SAID LAMP HAVING A LIGHT CENTER, SAID REFLECTOR BEING FORMED ON ITS INTERIOR SURFACES ON OPPOSITE SIDES WITH A PLURALITY OF REFLECTING SURFACES ARRANGED IN STEPS ALONG THE LENGTH OF SAID REFLECTOR, EACH REFLECTING SURFACE BEING ELONGATED FROM SAID RIM TOWARD THE TOP SAID REFLECTOR, SAID STEPPED REFLECTING SURFACES BEING ARRANGED IN FOUR GROUPS EACH COMPRISING A PLURALLITY OF REFLECTING SURFACES AND LOCATED RESPECTIVELY IN QUADRANTS FORMED BY THE LONGITUDINAL MEDIAN PLANE OF SAID REFLECTOR INTERSECING A TRANSVERSE PLANE NORMAL THERETO PASSING THROUGH SAID LIGHT CENTER, SAID STEPPED REFLECTING SURFACES BEING PARABOLIDAL IN BOTH HORIZONTAL AND VERTICAL CROSS SECTION, THE OPTICAL AXES OF THE REFLECTING SURFACES IN ADJACENT GROUPS BEING APPROXIMATELY AT RIGHT ANGLES.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |