Patent US4244013A successfully refreshed from Google Patents.
US4244013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular fluorescent light unit
Assignee: VAN ESS MARGARET 4911 NORTH MCVICKER CHICAGO IL 60630
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Filing: 1978-09-21
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Granted: 1981-01-06
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Expires: 1998-09-21
Abstract
Abstract A screw-in circular fluorescent light unit having a circular light source, a hub having a screw-in base at the axis of the annular light source, and a plurality of symmetrically arranged support spokes extending radially from the hub to the circular light source. The support spokes are positioned and dimensioned so that the unit provides uniform illumination over the surface of a lamp shade.
Inventors
- 👤 Joseph P. Wotowiec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:34
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/002; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A light unit comprising a circular light source of which the opposed circular edges respectively lie in a pair of spaced apart parallel planes, and three or more individual elongated light baffle members extending radially from the central axis of said circular light source and toward said light source, the widths of said light baffle members being at least as great as the thickness of said circular light source and extending completely between or beyond both planes of said pair of planes such as to cause said light unit when lighted to substantially uniformly illuminate the surface of a shade positioned around said light unit, there being spaces between said elongated light-baffle members through which a lamp harp can pass.
Claim 2
Dependent Claim
120 words
A light unit comprising a circular light source of which the opposed circular edges respectively lie in a pair of spaced apart parallel planes, and three or more individual elongated light baffle members extending radially from the central axis of said circular light source and toward said light source, the widths of said light baffle members being at least as great as the thickness of said circular light source and extending completely between or beyond both planes of said pair of planes such as to cause said light unit when lighted to substantially uniformly illuminate the surface of a shade positioned around said light unit, there being spaces between said elongated light-baffle members through which a lamp harp can pass.
Claim 3
Dependent Claim
26 words
A light unit as claimed in claim 1, including a hub positioned on said central axis, and a screw-base attached to an end of said hub.
Claim 4
Dependent Claim
26 words
A light unit as claimed in claim 1, in which the outer ends of said light-baffle members are attached to and support said circular light source.
Claim 5
Dependent Claim
20 words
A light unit as claimed in claim 1, in which said light-baffle members are arranged symmetrically around said central axis.
Claim 6
Dependent Claim
38 words
A light unit as claimed in claim 3, including a connector member positioned in a gap in said circular light source, said connector member being at the outer end of and integral with one of said light-baffle members.
Claim 7
Dependent Claim
26 words
A light unit as claimed in claim 3, including a hub positioned on said central axis, and a screw-base attached to an end of said hub.
Claim 8
Dependent Claim
25 words
A light unit as claimed in claim 1, in which said widths of the light-baffle members extend approximately equal distances beyond each of said planes.
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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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |