Diffusing coating

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Reexamination Certificate

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Details

C428S328000, C428S329000, C428S331000, C428S332000, C428S334000, C428S336000

Reexamination Certificate

active

07105222

ABSTRACT:
The invention relates the field of light boxes, and more specifically to a diffusing layer intended to be deposited on a substrate for making a light source homogeneous. The diffusing layer according to the invention consists of agglomerated semitransparent mineral particles in a mineral binder and is characterized by the particles having a mean diameter of between 0.3 and 2 microns, the binder being in a proportion of between 10 and 40% by volume, the particles forming aggregates whose size is between 0.5 and 20 microns, preferably less than 5 microns, and the layer having a contrast attenuation of greater than 40%. The invention also relates to uses for the production of flat lamps.

REFERENCES:
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patent: 5948481 (1999-09-01), Yan et al.
patent: 6034470 (2000-03-01), Vollkommer et al.
patent: 6302926 (2001-10-01), Anselmann et al.
patent: 6590625 (2003-07-01), Umemoto et al.
patent: 688818 (1995-12-01), None
patent: 02173701 (1988-12-01), None
patent: 03084848 (1991-04-01), None
patent: 09113707 (1995-10-01), None
patent: 11038232 (1997-07-01), None
patent: 11323196 (1998-05-01), None
patent: 11038232 (1999-02-01), None

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