US3953451A
Expired / Lapsed
US
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Compounds of the naphthalimide series
Assignee: BASF SE
•
Filing: 1974-11-18
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Granted: 1976-04-27
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Expires: 1994-11-18
Abstract
Abstract Naphthalimides of the formula ##SPC1## In which R is substituted alkyl or heteroaralkyl and R' is alkyl or alkyl bearing alkoxy or hydroxy as a substituent. The compounds are eminently suitable for the optical brightening of synthetic fibers, particularly acrylonitrile polymers, on which outstanding brightening effects are obtained.
Inventors
- 👤 Renate Elisabeth Hell
- 👤 Horst Scheuermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:36
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A compound of the formula ##SPC16## in which R is -alkylene-T or ##SPC17## alkylene is --CH 2 CH 2 --, --CH 2 CH 2 CH 2 --, ##EQU9## or ##EQU10## and ##EQU11## ##SPC18## R 5 is alkyl of 1 to 4 carbon atoms or β-hydroxyethyl, R 6 is hydrogen, alkyl of 1 to 4 carbon atoms or β-hydroxyethyl, R 5 and R 6 together with the nitrogen are pyrrolidino or piperidino, X is methyl, ethyl, propyl or benzyl, R 1 is C 1 - to C 4 -alkyl, B is C 1 - to C 4 -alkyl or C 2 H 4 OH and
Claim 2
Dependent Claim
104 words
A compound of the formula ##SPC16## in which R is -alkylene-T or ##SPC17## alkylene is --CH 2 CH 2 --, --CH 2 CH 2 CH 2 --, ##EQU9## or ##EQU10## and ##EQU11## ##SPC18## R 5 is alkyl of 1 to 4 carbon atoms or β-hydroxyethyl, R 6 is hydrogen, alkyl of 1 to 4 carbon atoms or β-hydroxyethyl, R 5 and R 6 together with the nitrogen are pyrrolidino or piperidino, X is methyl, ethyl, propyl or benzyl, R 1 is C 1 - to C 4 -alkyl, B is C 1 - to C 4 -alkyl or C 2 H 4 OH and
Claim 3
Dependent Claim
12 words
A - is chloride, bromide, iodide, sulfate, methosulfate, ethosulfate, benzene-sulfonate or toluenesulfonate.
Claim 4
Dependent Claim
12 words
A - is chloride, bromide, iodide, sulfate, methosulfate, ethosulfate, benzene-sulfonate or toluenesulfonate.
Claim 5
Dependent Claim
29 words
A compound according to the formula in claim 1, wherein ##EQU12## ##SPC19## B, n, R 5 , R 6 and X having the meanings set forth in claim 1.
Claim 6
Dependent Claim
11 words
The compound as claimed in claim 1 of the formula ##SPC20##
Claim 7
Dependent Claim
11 words
The compound as claimed in claim 1 of the formula ##SPC21##
References Cited (Backward Citations)
US3697525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |