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US5115380A Expired / Lapsed US ⏱️ 0.0 years remaining

Task light panel

Assignee: MillerKnoll Inc
•
Filing: 1991-05-06
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Granted: 1992-05-19
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Expires: 2011-05-06
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Abstract

Abstract A task light panel for use with a light source for illuminating a work surface. The panel comprises an upper surface having a plurality of transverse grooves formed thereon and a lower surface having a plurality of longitudinal grooves formed thereon. The transverse and longitudinal grooves are substantially perpendicular to each other and are adapted to distribute light from the light source onto the work surface, reduce glare or veiling reflections from the work surface, and block direct viewing of the light source by an individual using the work surface.

Inventors

  • 👤 James H. Huisingh
  • 👤 Edward L. Elzinga

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:54
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0012; F21V5/00; F21V5/02; F21W; F21W2131/00; F21W2131/30; F21W2131/301; F21Y; F21Y2103/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 157 words
In combination, a work station having a work surface illuminated by a light source, and a panel interposed between the light source and the work surface for distributing light onto the work surface, said work surface including front and rear edges and opposed side edges, said panel comprising a first surface and a second surface; and a plurality of like asymmetrical first prisms on the panel first surface substantially parallel to the front edge; and a plurality of asymmetrical second prisms on the second surface substantially parallel to a side edge; said second prisms being substantially perpendicular to the first prisms; said panel being positioned adjacent the light source and away from the work surface a sufficient distance so that the prisms will refract light from the light source substantially toward the area bounded by the front, rear, and side edges for uniform illumination of the work surface and away from the area outside the work surface.
Claim 2
Dependent Claim 157 words
In combination, a work station having a work surface illuminated by a light source, and a panel interposed between the light source and the work surface for distributing light onto the work surface, said work surface including front and rear edges and opposed side edges, said panel comprising a first surface and a second surface; and a plurality of like asymmetrical first prisms on the panel first surface substantially parallel to the front edge; and a plurality of asymmetrical second prisms on the second surface substantially parallel to a side edge; said second prisms being substantially perpendicular to the first prisms; said panel being positioned adjacent the light source and away from the work surface a sufficient distance so that the prisms will refract light from the light source substantially toward the area bounded by the front, rear, and side edges for uniform illumination of the work surface and away from the area outside the work surface.
Claim 3
Dependent Claim 41 words
A work station according to claim 1 wherein the side edges are approximately 30 inches in length and the panel is positioned away from the work surface in the range of 16.75 inches to 25.25 inches away from the work surface.

References Cited (Backward Citations)

US3179796A Cited
US4054793A Cited
US4071750A Cited
US4233651A Cited
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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) 1995-05-19 1995-11-18 1996-05-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-05-19 1999-11-18 2000-05-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-05-19 2003-11-18 2004-05-19 $7700.00 Window Closed / Lapsed

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