Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate
2006-06-13
2006-06-13
McNeil, Jennifer C. (Department: 1775)
Stock material or miscellaneous articles
Composite
Of quartz or glass
C428S428000, C428S697000, C428S698000, C428S699000, C428S701000, C428S702000
Reexamination Certificate
active
07060359
ABSTRACT:
The present invention provides a coating for a transparent substrate which exhibits a “neutral” color through a wide range of angles of incidence of light. The coating employs a base coat adjacent the transparent substrate having a thickness of no more than about 275 Å and may include two reflective metal layers having an intermediate layer of an anti-reflective metal oxide therebetween and an outer anti-reflective layer of metal oxide over the second reflective metal layer. If so desired, the coating of the invention may include an abrasive-resistant overcoat as its outermost layer. This overcoat is desirably formed of an abrasive-resistant metal oxide, such as zinc oxide applied at a thickness which does not significantly affect the optical properties of said coated substrate.
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Bond Robert
Eby Eric
O'Shaughnessy Roger
Blackwell G.
Cardinal CG Company
Fredrikson & Byron PA
McNeil Jennifer C.
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