US4814453A
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Naphthalimides containing sulfuric acid ester groups, a process for their preparation and their use
Assignee: Hoechst AG
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Filing: 1987-05-29
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Granted: 1989-03-21
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Expires: 2007-05-29
Abstract
Abstract New optical brighteners of the general formula ##STR1## in which R denotes hydrogen, alkyl, alkoxyalkyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, phenyl, alkylphenyl or xylyl, X denotes a C 2 -C 7 -alkylene group or a bridge member of the formula --X 1 --(OX 2 ) n -- in which X 1 and X 2 denote C 2 H 4 or C 3 H 7 and n denotes 1 or 2 and Me denotes a proton, an alkali metal cation or a cation NH 2 R 1 R 2 in which R 1 and R 2 represent hydrogen, alkyl or hydroxyalkyl.
Inventors
- 👤 Erich Schinzel
- 👤 Thomas Martini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:08
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A compound of the formula ( 1) ##STR14## in which R denotes hydrogen, alkyl, alkoxyalkyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, phenyl, alkylphenyl or xylyl, X denotes a C 2 -C 7 -alkylene group or a bridge member of the formula --X 1 --(OX 2 ) n --in which X 1 and X 2 denote C 2 H 4 or C 3 H 7 and n denotes 1 or 2 and Me denotes a proton, an alkali metal cation or a cation NH 2 R 1 R 2 in which R 1 and R 2 represent hydrogen, alkyl or hydroxyalkyl.
Claim 2
Dependent Claim
98 words
A compound of the formula ( 1) ##STR14## in which R denotes hydrogen, alkyl, alkoxyalkyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, phenyl, alkylphenyl or xylyl, X denotes a C 2 -C 7 -alkylene group or a bridge member of the formula --X 1 --(OX 2 ) n --in which X 1 and X 2 denote C 2 H 4 or C 3 H 7 and n denotes 1 or 2 and Me denotes a proton, an alkali metal cation or a cation NH 2 R 1 R 2 in which R 1 and R 2 represent hydrogen, alkyl or hydroxyalkyl.
Claim 3
Dependent Claim
68 words
A compound of the formula 1 as claimed in claim 1, in which R denotes hydrogen, C 1 -C 4 -alkyl or benzyl, X denotes C 2 -C 5 -alkylene and Me denotes a proton, an alkali metal cation or a cation --NH 2 R 1 R 2 in which R 1 and R 2 represent hydrogen, C 1 -C 2 -alkyl or C 1 -C 2 -hydroxyalkyl.
References Cited (Backward Citations)
GB962019A
Cited
GB2127015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |