Patent US3974584A successfully refreshed from Google Patents.
US3974584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light enclosure for suspended ceiling
Assignee: Individual
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Filing: 1975-03-28
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Granted: 1976-08-17
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Expires: 1995-03-28
Abstract
Abstract The lighted sign enclosure has a transparent, or translucent hollow body, reaching down from the ceiling, and inside the body a U-shaped fluorescent light tube, extending essentially as far down as the hollow body and back up. The body has a top rim, held on a grid of T-bars or similar bars of the ceiling. It is normally used as a sign, and offers a unique way of displaying symbols, especially pictures.
Inventors
- 👤 Richard A. Shorette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:54
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; Y; Y10; Y10S; Y10S362/00; Y10S362/812
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
In combination with a suspended ceiling having ceiling tiles supported on a framework of mutually perpendicular support bars, a unitary, self-contained light diffuser and advertising display comprising a hollow body formed of a translucent sheet material wholly enclosed except for an upwardly directed access opening, said body including an outwardly extending peripheral rim portion adjacent said opening for resting on rectangularly disposed support bars, said hollow body extending a substantial distance downwardly from said rim portion, a tubular light source fitted within said body through said opening and supported therein by a mounting plate affixed to said body adjacent its opening, said tubular light source being in the form of a loop with its lower end in proximity to the lower inner surface of said body, the sheet material forming said body being continuous throughout except for said opening and thereby wholly enclosing said light source and advertising indicia disposed on the surface of said body for illumination by said light source.
Claim 2
Dependent Claim
162 words
In combination with a suspended ceiling having ceiling tiles supported on a framework of mutually perpendicular support bars, a unitary, self-contained light diffuser and advertising display comprising a hollow body formed of a translucent sheet material wholly enclosed except for an upwardly directed access opening, said body including an outwardly extending peripheral rim portion adjacent said opening for resting on rectangularly disposed support bars, said hollow body extending a substantial distance downwardly from said rim portion, a tubular light source fitted within said body through said opening and supported therein by a mounting plate affixed to said body adjacent its opening, said tubular light source being in the form of a loop with its lower end in proximity to the lower inner surface of said body, the sheet material forming said body being continuous throughout except for said opening and thereby wholly enclosing said light source and advertising indicia disposed on the surface of said body for illumination by said light source.
Claim 3
Dependent Claim
40 words
In combination with a suspended ceiling as set forth in claim 1 wherein said hollow body is formed of two vertically discrete portions bonded together in edge-to-edge relationship, each portion being formed with a portion of said peripheral rim thereon.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |