High brightness durable retro-reflecting microspheres and method

Details High brightness durable retro-reflecting microspheres and method High brightness durable retro-reflecting microspheres and method

1995-04-24

1996-11-19

Le, Hoa T.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

404 14, 428331, 428404, 428406, B32B 516, B25G 300

Patent

active

055760970

ABSTRACT:
High brightness durable retro-reflecting microspheres for retro-reflection and related uses (and a novel method of forming the same) is provided embodying a retro-reflective vitreous glass microsphere encapsulated in a hardened clear non-vitreous metal-oxide ceramic shell of substantially the same index of fraction as the microsphere.

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patent: 3429827 (1969-02-01), Ruus
patent: 3709706 (1973-01-01), Sowman
patent: 4564556 (1986-01-01), Lange
patent: 4758469 (1988-07-01), Lange
patent: 4957335 (1990-09-01), Kuney
patent: 5417515 (1995-05-01), Hachey et al.

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