Compositions – Light transmission modifying compositions – Displaying color change
Patent
1995-05-31
1996-07-02
Chan, Nicky
Compositions
Light transmission modifying compositions
Displaying color change
549389, 524110, G02B 523, G02B 2400
Patent
active
055319351
ABSTRACT:
A naphthopyran compound represented by the formula: ##STR1## wherein R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, and R.sub.11 are each selected from the group consisting essentially of hydrogen, a first stable organic radical, a heterocyclic group, halogen, a first nitrogen-substituted group, and a first nitrogen-substituted ring compound; A and B are each selected from the group consisting essentially of hydrogen, substituted phenyl, and substituted naphthyl, provided that at least one of A or B is substituted phenyl or substituted naphthyl; and any substituent of any substituted phenyl or substituted naphthyl at A or B is selected from the group consisting essentially of hydrogen, a second stable organic radical, a heterocyclic group, halogen, a second nitrogen-substituted group, and a second nitrogen-substituted ring compound, provided that at least one substituent of any substituted phenyl or substituted naphthyl at either A or B is phenyl, naphthyl, or furyl.
REFERENCES:
patent: 3567605 (1971-03-01), Becker
patent: 4931221 (1990-06-01), Heller
patent: 5066818 (1991-11-01), Gemert et al.
patent: 5106998 (1992-04-01), Tanaka et al.
patent: 5238981 (1993-08-01), Knowles
patent: 5244602 (1993-09-01), Van Gemert
patent: 5274132 (1993-12-01), Van Gemert
Hughes Frank J.
Travnicek Edward A.
BMC Industries, Inc.
Chan Nicky
LandOfFree
Photochromic naphthopyran compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photochromic naphthopyran compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic naphthopyran compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1503965