Patent classifications
C
CHEMISTRY; METALLURGY
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C09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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C09B
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; , e.g. PIGMENTS; MORDANTS; LAKES
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3/00
Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
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C09B3/18
Preparation from starting materials already containing the perylene nucleus
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C09B3/20

Optical element for correcting color blindness
09574067 · 2017-02-21 · ·

Described herein are devices, compositions, and methods for improving color discernment.

Optical element for correcting color blindness
09574067 · 2017-02-21 · ·

Described herein are devices, compositions, and methods for improving color discernment.