Patent US3170636A successfully refreshed from Google Patents.
US3170636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective lamps
Assignee: Grimes Manufacturing Co
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Filing: 1963-04-15
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Granted: 1965-02-23
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Expires: 1983-04-15
Abstract
No abstract record available.
Inventors
- 👤 Robert G Nordquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:27
CPC Classifications
B; B60; B60Q; B60Q3/00; B60Q3/70; B60Q3/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A LAMP COMPRISING FIRST DOME MEANS FORMING AN ELLIPSOIDAL INTERIORLY-REFLECTING VERTEX SURFACE HAVING A MAJOR AXIS CONTAINING FIRST AND SECOND FOCAL POINTS RESPECTIVELY AT FURTHER DISTANCES FROM THE SURFACES, THE EDGE OF SAID SURFACE TERMINATING SUBSTANTIALLY IN THE FIRST FOCAL POINT PLANE WHICH IS PERPENDICULAR TO SAID AXIS, SECOND DOME MEANS CONNECTED TO SAID FIRST DOME MEANS AND FORMING A HEMISPHERICAL INTERIORLY-REFLECTING SURFACE WHICH FACES SAID ELLIPSOIDAL SURFACE AND HAS ITS CENTER OF CURVATURE AT SAID FIRST FOCAL POINT, SAID SECOND DOME MEANS INCLUDING A PERDETERMINED LIGHT APERTURE THROUGH SAID HEMISPHERICAL SURFACE AT ITS VERTEX CENTERED ON SAID AXIS, A LIGHT SOURCE CENTERED ON SAID FIRST FOCAL POINT, AND MEANS EXTENDING THROUGH SAID SECOND DOME MEANS AT AN ACUTE ANGLE RELATIVE TO SAID AXIS FOR SUPPORTING SAID LIGHT SOURCE AND SUPPLYING ELECTRICAL SIGNALS THERETO TO CAUSE SUBSTANTIALLY ALL THE LIGHT RAYS EMANATING FROM SAID SOURCE TO PASS THROUGH SAID LIGHT APERTURE EITHER DIRECTLY OR BY REFLECTION FROM SAID REFLECTING SURFACES, THE SO REFLECTED RAYS BEING CAUSED BY SAID SURFACES TO CONVERGE AT SAID SECOND FOCAL POINT.
Claim 2
Dependent Claim
176 words
A LAMP COMPRISING FIRST DOME MEANS FORMING AN ELLIPSOIDAL INTERIORLY-REFLECTING VERTEX SURFACE HAVING A MAJOR AXIS CONTAINING FIRST AND SECOND FOCAL POINTS RESPECTIVELY AT FURTHER DISTANCES FROM THE SURFACES, THE EDGE OF SAID SURFACE TERMINATING SUBSTANTIALLY IN THE FIRST FOCAL POINT PLANE WHICH IS PERPENDICULAR TO SAID AXIS, SECOND DOME MEANS CONNECTED TO SAID FIRST DOME MEANS AND FORMING A HEMISPHERICAL INTERIORLY-REFLECTING SURFACE WHICH FACES SAID ELLIPSOIDAL SURFACE AND HAS ITS CENTER OF CURVATURE AT SAID FIRST FOCAL POINT, SAID SECOND DOME MEANS INCLUDING A PERDETERMINED LIGHT APERTURE THROUGH SAID HEMISPHERICAL SURFACE AT ITS VERTEX CENTERED ON SAID AXIS, A LIGHT SOURCE CENTERED ON SAID FIRST FOCAL POINT, AND MEANS EXTENDING THROUGH SAID SECOND DOME MEANS AT AN ACUTE ANGLE RELATIVE TO SAID AXIS FOR SUPPORTING SAID LIGHT SOURCE AND SUPPLYING ELECTRICAL SIGNALS THERETO TO CAUSE SUBSTANTIALLY ALL THE LIGHT RAYS EMANATING FROM SAID SOURCE TO PASS THROUGH SAID LIGHT APERTURE EITHER DIRECTLY OR BY REFLECTION FROM SAID REFLECTING SURFACES, THE SO REFLECTED RAYS BEING CAUSED BY SAID SURFACES TO CONVERGE AT SAID SECOND FOCAL POINT.
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |