US3687987A
Expired / Lapsed
US
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Substituted chalcogeno derivatives of tetracyanoquinodimethans
Assignee: EIDP Inc
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Filing: 1969-04-07
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Granted: 1972-08-29
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Expires: 1989-04-07
Abstract
Abstract Described and claimed are variously substituted chalcogeno tetracyanoquinodimethans of the formula Y is oxygen or sulfur; and R1 and A - A4 are any of numerous organic substituents. The substituted tetracyanoquinodimethans of this invention, upon reaction with organic or organoinorganic Lewis bases, are converted to useful paramagnetic charge-transfer compounds; further, the compounds of this invention all form yellow complexes with aromatic compounds and are useful in dyeing polystyrene.
Inventors
- 👤 Elmore L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/08; C07C; C07C255/00; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D319/10; C07D319/14; C07D319/16; C07D319/18; C07D319/20; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
10 words
The compound of claim 1 wherein Ra Rb methyl, 7,7,8,8-Tetracyano-2,5-Dimethoxyquinodimethan.
Claim 2
Dependent Claim
10 words
The compound of claim 1 wherein Ra Rb ethyl, 7,7,8,8-Tetracyano-2,5-Diethoxyquinodimethan.
Claim 3
Dependent Claim
10 words
The compound of claim 1 wherein Ra Rb isopropyl, 7,7,8,8-Tetracyano-2,5-Diisopropoxyquniodimethan.
Claim 4
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb ethyl, 7,7,8,8-Tetracyano-2-Methoxy-5-Ethoxyquinodimethan.
Claim 5
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb isopropyl, 7,7,8,8-Tetracyano-2-Methoxy-5-Isopropoxyquinodimethan.
Claim 6
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb isobutyl, 7,7,8,8-Tetracyano-2-Methoxy-5-Isobutoxyquinodimethan.
Claim 7
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb isopentyl, 7,7,8,8-Tetracyano-2-Methoxy-5Isopentoxyquinodimethan.
Claim 8
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb decyl, 7,7,8,8-Tetracyano-2-Methoxy-5-Decoxyquinodimethan.
Claim 9
Dependent Claim
15 words
The compound of claim 1 wherein Ra methyl and Rb Beta -methoxyethyl, 7,7,8,8-Tetracyano-2-Methoxy-5-( Beta -Methoxyethoxy)quinodimethan.
Claim 10
Dependent Claim
15 words
The compound of claim 1 wherein Ra methyl and Rb Beta -ethoxyethyl, 7,7,8,8-Tetracyano-2-Methoxy-5-( Beta -Ethoxyethoxy)quinodimethan.
Claim 11
Dependent Claim
12 words
The compound of claim 1 wherein Ra methyl and Rb carboxymethoxy, 7,7,8,8-Tetracyano-2-Methoxy-5-(Carboxy-methoxy)quinodimethan.
Claim 12
Dependent Claim
10 words
The compound of claim 1 wherein Ra Rb isobutyl, 7,7,8,8-Tetracyano-2,5-diisobutoxyquinodimethan.
Claim 13
Dependent Claim
10 words
The compound of claim 1 wherein Ra Rb butyl, 7,7,8,8-Tetracyano-2,5-Dibutoxyquinodimethan.
Claim 14
Dependent Claim
11 words
The compound of claim 1 wherein Ra Rb isopentyl, 7,7,8, 8-Tetracyano-2,5-Diisopentoxyquinodimethan.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |