The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2000
Filed:
Feb. 06, 1998
Applicant:
Inventor:
Udo C Pernisz, Midland, MI (US);
Assignee:
Dow Corning Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; B05D / ;
U.S. Cl.
CPC ...
5253265 ; 5253327 ; 525474 ; 25230135 ;
Abstract
A photoluminescent material is prepared by burning hydrogen silsesquioxane resin powder in a crucible in oxygen or ammonia atmosphere at a temperature above 400.degree. C. for about two hours. The photoluminescent material has a smooth compact surface surrounding a porous and loosely packed interior, the smooth compact surface exhibiting blue photoluminescence when irradiated with ultraviolet light, and the interior portion exhibits photoluminescence at longer wavelengths when irradiated under the same conditions with ultraviolet light.