Patents Represented by Attorney, Agent or Law Firm Peter Rogalskj
  • Naphthopyrans and phenanthropyrans annelated in C5-C6 with a bicycle group and compositions and (co) polymer matrices containing them
    Patent number: 6210608
    Abstract: The invention relates to novel naphthopyran- and phenanthropyran-type compounds having a carbobicycle annelated in 5,6-position. These compounds have formula (I) given below: These compounds (I) have interesting photochromic properties. The invention also relates to their preparation, to their applications as photochromes, as well as to the compositions and (co)polymer matrices containing them.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: April 3, 2001
    Assignee: Corning S.A.
    Inventors: You-Ping Chan, Patrick Jean