Mixed carbonate ester derivatives of quinophthalone dyes and their preparation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 7, 1993
Grant Date -
N/A
app pub date -
Jun 29, 1990
filing date -
Jun 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mixed carbonate ester of a quinophthalone dye and a tertiary alkanol containing not more than about 9 carbon atoms, preferably a compound of the formula: ##STR1## wherein X is a sulfur atom or a carbonyl group; each Y independently is a hydrogen atom, a halogen atom, a --CO--OR.sup.4 or a --CO--NHR.sup.4 group, wherein R.sup.4 is an alkyl group containing not more than about 10 carbon atoms; R is a hydrogen atom or an --O--C(.dbd.O)--O--CR.sup.5 R.sup.6 R.sup.7 group; and R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6 and R.sup.7 are each an alkyl group, subject to the proviso that R.sup.1, R.sup.2 and R.sup.3 together contain a total of not more than about 8 carbon atoms, and R.sup.5, R.sup.6 and R.sup.7 together contain a total of not more than about 8 carbon atoms.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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