Patent · US Active

Ophthalmic substrates having surface with functional dots containing first and second photochromic colorants

US10969525B2 · kind B2 · utility

1Cited by
2References
20Claims
0Family size

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Inventors

Key dates

Filing dateJun 3, 2019
Grant dateApr 6, 2021
Priority date—
Expiry dateJun 3, 2039

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B5/208
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Optical devices having multi-functional coatings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.