Indolinospiropyran compounds and methods for their manufacture

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C544S071000

Reexamination Certificate

active

06803471

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to spiropyran compounds. In particular, the invention provides indolinospiropyran compounds and methods for their manufacture, which compounds are useful as photochromic compounds.
BACKGROUND OF THE INVENTION
Various classes of photochromic compounds have been synthesized and suggested for use in applications in which reversible color changes or darkening is induced by sunlight. For example, spiro(indolino)naphthopyrans and spiro(indolino)quinopyrans are described in GB Patent 2,174,711. Spiropyrans also are described in Brown, Glenn H. ed.,
Photochromism
(New York, 1971) and Durr, Heinz and Henri Bouas-Laurent eds.,
Photochromism
(Elsevier, 1990).
Spiropyran derivatives may be the best known organic compounds showing photochromism phenomenon, but the structures of reported spiropyrans are considerably limited. Thus, a need exists both for spiropyran compounds allowing further facile modifications as well as methods for the synthesis of diverse spiropyran compounds.


REFERENCES:
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4556605 (1985-12-01), Mogami et al.
patent: 4816584 (1989-03-01), Kwak et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 4931221 (1990-06-01), Heller
patent: 5645768 (1997-07-01), Melzig et al.
patent: 6521753 (2003-02-01), Carreira et al.
patent: 0141407 (1985-05-01), None
patent: 0246114 (1987-11-01), None
patent: 0449669 (1991-10-01), None
patent: 2174711 (1986-11-01), None
patent: WO94/22850 (1994-11-01), None
Malaysian Search Report, dated Nov. 28, 2003, for Malaysian Appln. No. PI 2001 2551.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Indolinospiropyran compounds and methods for their manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Indolinospiropyran compounds and methods for their manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indolinospiropyran compounds and methods for their manufacture will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3316210

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.