Patent · US Active

Naphthols useful for preparing indeno-fused photochromic naphthopyrans

US7557208B2 · kind B2 · utility

12Cited by
59References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 11, 2008
Grant dateJul 7, 2009
Priority date—
Expiry dateNov 11, 2028

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T442/259
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Described are naphthols useful in the manufacture of novel indeno-fused photochromic naphthopyran materials.

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