Patent US5020252A successfully refreshed from Google Patents.
US5020252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminated sign system
Assignee: Individual
•
Filing: 1987-11-05
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Granted: 1991-06-04
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Expires: 2007-11-05
Abstract
Abstract An illuminated sign system, e.g., an illuminated canopy or roof ridge for petrol stations and the like, comprising a trough with one or more electrical fluorescent tubes partially covered by a light shield having areas of differing light transmissivity, e.g., filters or translucent areas, with reflecting screens in oblique position in the rear, optionally colored to reflect light of one or more selected colors, and a front side of transparent weather-proof material covered with translucent colored indicia.
Inventors
- 👤 Johannes A. G. De Boef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:35
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G09F13/14; G09F13/0409; G09F13/0418; G09F13/0472; G09F13/0422; G09F2013/145
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
An illuminated sign assembly having a housing and a sign mounted therein, the sign including a face plate with indicia thereon, said sign assembly including, within said housing, an elongated tubular fluorescent lamp for generating light output for illuminating the sign face plate from the rear, the improvement comprising a light shield interposed between said lamp and said face plate, in which said shield extends generally along the length of said lamp and is U-shaped in transverse section with the open part of the U-shape being directed toward said tubular lamp, said shield being especially adapted to illuminate the indicia on the face plate, said shield including a plurality of translucent strips extending generally parallel to each other and to the axis of said tubular lamp, which strips differ in light transmissivity from the non-strip portion of said shield to provide selected elongated horizontal illuminated areas on said face plate, which selected horizontal areas differ in illumination on said face plate.
Claim 2
Dependent Claim
161 words
An illuminated sign assembly having a housing and a sign mounted therein, the sign including a face plate with indicia thereon, said sign assembly including, within said housing, an elongated tubular fluorescent lamp for generating light output for illuminating the sign face plate from the rear, the improvement comprising a light shield interposed between said lamp and said face plate, in which said shield extends generally along the length of said lamp and is U-shaped in transverse section with the open part of the U-shape being directed toward said tubular lamp, said shield being especially adapted to illuminate the indicia on the face plate, said shield including a plurality of translucent strips extending generally parallel to each other and to the axis of said tubular lamp, which strips differ in light transmissivity from the non-strip portion of said shield to provide selected elongated horizontal illuminated areas on said face plate, which selected horizontal areas differ in illumination on said face plate.
Claim 3
Dependent Claim
160 words
An illuminated sign assembly having a housing and a sign mounted therein, the sign including a face plate with indicia thereon, said sign assembly including, within said housing, an elongated tubular fluorescent lamp for generating light output for illuminating the face plate from the rear, the improvement comprising a light shield interposed between said lamp and said face plate, in which said shield extends generally along the length of said lamp and is curved in transverse section with the open part of the curve being directed toward said tubular lamp, said shield being especially adapted to illuminate the indicia on the face plate, said shield including a plurality of translucent strips extending generally parallel to each other and to the axis of said tubular lamp which strips differ in light transmissivity from the non-strip portion of said shield to provide selected elongated horizontal illuminated areas on said face plate, which selected horizontal areas differ in illumination on said face plate.
Claim 4
Dependent Claim
160 words
An illuminated sign assembly having a housing and a sign mounted therein, the sign including a face plate with indicia thereon, said sign assembly including, within said housing, an elongated tubular fluorescent lamp for generating light output for illuminating the face plate from the rear, the improvement comprising a light shield interposed between said lamp and said face plate, in which said shield extends generally along the length of said lamp and is curved in transverse section with the open part of the curve being directed toward said tubular lamp, said shield being especially adapted to illuminate the indicia on the face plate, said shield including a plurality of translucent strips extending generally parallel to each other and to the axis of said tubular lamp which strips differ in light transmissivity from the non-strip portion of said shield to provide selected elongated horizontal illuminated areas on said face plate, which selected horizontal areas differ in illumination on said face plate.
Claim 5
Dependent Claim
23 words
A light source according to claims 1 or 2 in which certain of said strips constitute filters responsive to light of preselected wavelength.
Claim 6
Dependent Claim
20 words
A light source according to claims 1 or 2 in which the ends of said lamp are open and unshielded.
Claim 7
Dependent Claim
26 words
A light source according to any one of claims 1, including a reflector positioned behind said lamp for reflecting light from said lamp toward said sign.
Claim 8
Dependent Claim
28 words
A light source according to claim 5, in which selected areas of said reflector are colored to reflect light of one or more selected colors toward said shield.
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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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |