Benzo-, naphtho- and phenanthrochromene substituted by carbamated or ureated phenyls, preparation thereof and compositions and articles containing them
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 31, 2007
Grant Date -
May 5, 2005
app pub date -
Jun 14, 2004
filing date -
Nov 5, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed are novel benzo-, naphtho- and phenanthrochromenes substituted by carbamated or ureated phenyls having the following general formula (I): ##STR00001## wherein R.sub.1 represents a group ##STR00002## their preparation, photochromic compositions and articles containing them. This family of compounds have interesting and useful photochromic properties, especially in terms of absorption band and discoloration speed.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully