Patent US3291979A successfully refreshed from Google Patents.
US3291979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire
Assignee: Holophane Corp
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Filing: 1966-04-05
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Granted: 1966-12-13
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Expires: 1986-04-05
Abstract
No abstract record available.
Inventors
- 👤 Logan Henry Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:12
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
IN COMBINATION IN A LUMINAIRE, INCLUDING A HOUSING, A LIGHT SOURCE POSITIONED WITHIN SAID HOUSING AND MENS FOR TRANSMITTING LIGHT POSITIONED BELOW SAID LIGHT SOURECE, SAID MEANS FOR TRANSMITTING LIGHT COMPRISING A CENTRAL PORTION INCLUDING MEANS FOR RECEIVING LIGHT INCIDENT THEREON AND FOR CONCENTRATING THE SAME INTO A COMPARATIVELY NARROW BEAM, SAID MEANS FOR TRANSMITTING LIGHT FURTHER COMPRISING AN OUTER PORTIONS, A VERTICAL PORTION INTERMEDIATE SAID CENTRAL AND OUTER PORTION AND INCLUDING MEANS FOR VERTICALLY REDIRECTING INCIDENT LIGHT FROM SAID SOURCE ABOVE SAID OUTER PORTION TO THE WALLS OF SAID HOUSING, AND MENS FORMED ON SAID OUTER PORTION FOR DOWNWARDLY REDIRECTING DIFFUSED LIGHT FORM SAID HOUSING WALLS.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |