Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate
2007-11-13
2007-11-13
Blackwell, G. (Department: 1775)
Stock material or miscellaneous articles
Composite
Of quartz or glass
C428S432000, C428S698000, C428S699000, C428S701000
Reexamination Certificate
active
11021482
ABSTRACT:
The invention provides graded photocatalytic coatings. In one aspect, the invention provides a substrate carrying a photocatalytic coating that includes a first graded film region and a second graded film region. The first graded film region has a substantially continuously decreasing concentration of a first transparent dielectric material and a substantially continuously increasing concentration of a second transparent dielectric material. The second graded film region has a substantially continuously decreasing concentration of the second transparent dielectric material and a substantially continuously increasing concentration of a third transparent dielectric material. In certain embodiments, the first transparent dielectric material comprises silicon dioxide, the second transparent dielectric material comprises zirconium oxide, and the third transparent dielectric material comprises titanium oxide. The invention also provides methods and equipment for depositing graded photocatalytic coatings.
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Hartig Klaus
Krisko Annette J.
Blackwell G.
Cardinal CG Company
Fredrikson & Byron , P.A.
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