Patent US3246133A successfully refreshed from Google Patents.
US3246133A
Expired / Lapsed
US
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Illuminating system
Assignee: Control Products Corp
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Filing: 1964-01-20
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Granted: 1966-04-12
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hensleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
G; G12; G12B; G12B11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN ILLUMINATING SYSTEM COMPRISING: A TRANSPARENT CONICAL OPTICAL ELEMENT, A COMPLEMENTARY TRANSPARENT OPTICAL ELEMENT HAVING A CONICAL CAVITY THEREIN SPACED FROM AND COAXIALLY DISPOSED WITH SAID CONICAL ELEMENT, AND A LIGHT SOURCE SO POSITIONED AS TO CAUSE RAYS OF LIGHT TO RADIATE THROUGH SAID CONICAL OPTICAL ELEMENT FROM THE VICINITY OF THE AXIS THEREOF.
Claim 2
Dependent Claim
54 words
AN ILLUMINATING SYSTEM COMPRISING: A TRANSPARENT CONICAL OPTICAL ELEMENT, A COMPLEMENTARY TRANSPARENT OPTICAL ELEMENT HAVING A CONICAL CAVITY THEREIN SPACED FROM AND COAXIALLY DISPOSED WITH SAID CONICAL ELEMENT, AND A LIGHT SOURCE SO POSITIONED AS TO CAUSE RAYS OF LIGHT TO RADIATE THROUGH SAID CONICAL OPTICAL ELEMENT FROM THE VICINITY OF THE AXIS THEREOF.
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |