US3383540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection lamp with multiple reflectors
Assignee: Corning Glass Works
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Filing: 1966-04-04
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Granted: 1968-05-14
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Richard B Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18; H01K1/24; F; F21; F21V; F21V7/00; F21V7/04; F21V7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A LAMP COMPRISING A FIRST REFLECTOR SECTION IN THE FORM OF A PORTION OF AN ELLIPSOID OF REVOLUTION ABOUT AN AXIS, A LIGHT SOURCE ON SAID AXIS AT THE PRINCIPAL FOCUS OF SAID ELLIPSOID OF REVOLUTION, A SECOND REFLECTOR SECTION IN THE FORM OF A PORTION OF A SPHERE HAVING ITS CENTER OF CURVATURE ON SAID AXIS AT THE CONJUGATE FOCUS OF SAID ELLIPSOID OF REVOLUTION AND HAVING AN APERTURE ALONG SAID AXIS, SAID SECOND REFLECTOR SECTION BEING CONVEX IN THE DIRECTION OF SAID FIRST REFLECTOR SECTION AND EXTENDING IN THE DIRECTION OF SAID AXIS NOT SUBSTANTIALLY FARTHER THAN THE CONE DEFINED BY LIGHT RAYS EMITTED FROM SAID LIGHT SOURCE IN A PLANE PERPENDICULAR TO SAID AXIS AND REFLECTED TOWARD SAID CONJUGATE FOCUS BY SAID FIRST REFLECTOR SECTION, AND A LIGHT-TRANSMITTING AREA WITHIN SAID APERTURE IN SAID SECOND REFLECTOR SECTION.
Claim 2
Dependent Claim
140 words
A LAMP COMPRISING A FIRST REFLECTOR SECTION IN THE FORM OF A PORTION OF AN ELLIPSOID OF REVOLUTION ABOUT AN AXIS, A LIGHT SOURCE ON SAID AXIS AT THE PRINCIPAL FOCUS OF SAID ELLIPSOID OF REVOLUTION, A SECOND REFLECTOR SECTION IN THE FORM OF A PORTION OF A SPHERE HAVING ITS CENTER OF CURVATURE ON SAID AXIS AT THE CONJUGATE FOCUS OF SAID ELLIPSOID OF REVOLUTION AND HAVING AN APERTURE ALONG SAID AXIS, SAID SECOND REFLECTOR SECTION BEING CONVEX IN THE DIRECTION OF SAID FIRST REFLECTOR SECTION AND EXTENDING IN THE DIRECTION OF SAID AXIS NOT SUBSTANTIALLY FARTHER THAN THE CONE DEFINED BY LIGHT RAYS EMITTED FROM SAID LIGHT SOURCE IN A PLANE PERPENDICULAR TO SAID AXIS AND REFLECTED TOWARD SAID CONJUGATE FOCUS BY SAID FIRST REFLECTOR SECTION, AND A LIGHT-TRANSMITTING AREA WITHIN SAID APERTURE IN SAID SECOND REFLECTOR SECTION.
References Cited (Backward Citations)
US3253255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |