US3144993A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1961-04-21
•
Granted: 1964-08-18
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Expires: 1981-04-21
Abstract
No abstract record available.
Inventors
- 👤 Sassmannshausen Knut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:37
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/30; F; F21; F21L; F21L2/00; F21V; F21V13/00; F21V13/02; F21V13/04; F21V15/00; F21V15/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A SEARCHLIGHT COMPRISING, IN COMBINATION, A CONCAVE PARABOLIC REFLECTOR; A LIGHT SOURCE LOCATED AT THE FOCAL POINT OF SAID REFLECTOR SO THAT THE LATTER CONCENTRATES A FIRST PART OF THE LIGHT EMANATING FROM SAID LIGHT SOURCE IN A BEAM HAVING SUBSTANTIALLY PARALLEL RAYS; AND A CONDENSER LENS LOCATED FORWARDLY OF SAID LIGHT SOURCE AND HAVING A FOCAL POINT LOCATED REARWARDLY OF THE FOCAL POINT OF SAID REFLECTOR SO THAT SAID CONDENSER LENS DIRECTS A SECOND PART OF THE LIGHT EMANATING FROM SAID LIGHT SOURCE IN A CONICAL LIGHT BEAM HAVING AN ANGLE OF DIVERGENCE BETWEEN 40 AND
Claim 2
Dependent Claim
97 words
A SEARCHLIGHT COMPRISING, IN COMBINATION, A CONCAVE PARABOLIC REFLECTOR; A LIGHT SOURCE LOCATED AT THE FOCAL POINT OF SAID REFLECTOR SO THAT THE LATTER CONCENTRATES A FIRST PART OF THE LIGHT EMANATING FROM SAID LIGHT SOURCE IN A BEAM HAVING SUBSTANTIALLY PARALLEL RAYS; AND A CONDENSER LENS LOCATED FORWARDLY OF SAID LIGHT SOURCE AND HAVING A FOCAL POINT LOCATED REARWARDLY OF THE FOCAL POINT OF SAID REFLECTOR SO THAT SAID CONDENSER LENS DIRECTS A SECOND PART OF THE LIGHT EMANATING FROM SAID LIGHT SOURCE IN A CONICAL LIGHT BEAM HAVING AN ANGLE OF DIVERGENCE BETWEEN 40 AND
References Cited (Backward Citations)
US1168064A
Cited
US1471923A
Cited
US1594635A
Cited
US1961964A
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US2014573A
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US2282167A
Cited
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Cited
US2289160A
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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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |