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

1996-01-23

1997-09-23

Beck, Shrive

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

427212, 427226, 4273722, 404 10, 404 11, 404 14, 404 16, 359541, B05D 700, E01F 900, G02B 5128

Patent

active

056702094

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.

REFERENCES:
patent: 2574971 (1951-11-01), Heltzer
patent: 3989775 (1976-11-01), Jack et al.
patent: 4957335 (1990-09-01), Kuney, Jr.

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