4. Compositions
  5. Light transmission modifying compositions
  6. Displaying color change

Stephen Nigel Corns

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Grey coloring photochromic fused pyrans

Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate

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Neutral coloring photochromic 2H-naphtho[1,2-b]...

Compositions – Light transmission modifying compositions – Displaying color change
Reexamination Certificate

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Photochromic compounds

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
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Red coloring hyperchromic 3H-naphtho[2,1-B]pyrans

Compositions – Light transmission modifying compositions – Displaying color change
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2088720

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