Patent US4138415A successfully refreshed from Google Patents.
US4138415A
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1,4-Bis(aminoalkylamino)-anthraquinones and leuco derivatives thereof
Assignee: Wyeth Holdings LLC
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Filing: 1978-05-05
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Granted: 1979-02-06
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Expires: 1998-05-05
Abstract
Abstract This disclosure describes 1,4-bis(substituted-amino)-5,6-dihydroxyanthraquinones and 1,4,5-tris(substituted-amino)-8-hydroxyanthraquinones useful as chelating agents, as curing catalysts for epoxy resins, and for inhibiting the growth of transplanted mouse tumors.
Inventors
- 👤 Keith C. Murdock
- 👤 Ralph G. Child
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:09
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; B; B01; B01J; B01J45/00; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/623
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A compound selected from the group consisting of those of the formula: ##STR5## wherein R 1 and R 2 are each individually selected from the group consisting of hydrogen, methyl, ethyl and 2-hydroxyethyl; R 3 is hydrogen or hydroxy; R 4 is hydrogen or a moiety of the formula: ##STR6## wherein R 1 and R 2 are as hereinabove defined with the proviso that one of R 3 and R 4 must be hydrogen but R 3 and R 4 may not both be hydrogen; and the pharmacologically acceptable acid-addition salts thereof.
Claim 2
Dependent Claim
92 words
A compound selected from the group consisting of those of the formula: ##STR5## wherein R 1 and R 2 are each individually selected from the group consisting of hydrogen, methyl, ethyl and 2-hydroxyethyl; R 3 is hydrogen or hydroxy; R 4 is hydrogen or a moiety of the formula: ##STR6## wherein R 1 and R 2 are as hereinabove defined with the proviso that one of R 3 and R 4 must be hydrogen but R 3 and R 4 may not both be hydrogen; and the pharmacologically acceptable acid-addition salts thereof.
Claim 3
Dependent Claim
95 words
A compound selected from the group consisting of those of the formula: ##STR7## wherein R 1 and R 2 are each individually selected from the group consisting of hydrogen, methyl, ethyl and 2-hydroxyethyl; R 3 is hydrogen or hydroxy; R 4 is hydrogen or a moiety of the formula: ##STR8## wherein R 1 and R 2 are as hereinabove defined with the proviso that one of R 3 and R 4 must be hydrogen but R 3 and R 4 may not both be hydrogen; the tautomers thereof; and the pharmacologically acceptable acid-addition salts thereof.
Claim 4
Dependent Claim
95 words
A compound selected from the group consisting of those of the formula: ##STR7## wherein R 1 and R 2 are each individually selected from the group consisting of hydrogen, methyl, ethyl and 2-hydroxyethyl; R 3 is hydrogen or hydroxy; R 4 is hydrogen or a moiety of the formula: ##STR8## wherein R 1 and R 2 are as hereinabove defined with the proviso that one of R 3 and R 4 must be hydrogen but R 3 and R 4 may not both be hydrogen; the tautomers thereof; and the pharmacologically acceptable acid-addition salts thereof.
Claim 5
Dependent Claim
25 words
The compound according to claim 1 wherein R 1 and R 2 are both methyl, R 3 is hydrogen, and R 4 is 2-dimethylaminoethylamino; 1,4,5-tris[(2-dimethylaminoethyl)amino]-8-hydroxyanthraquinone.
Claim 6
Dependent Claim
25 words
The compound according to claim 1 wherein R 1 and R 2 are both hydrogen, R 3 is hydroxy, and R 4 is hydrogen; 1,4-bis[(2-aminoethyl)amino]-5,6-dihydroxyanthraquinone.
Claim 7
Dependent Claim
25 words
The compound according to claim 2 wherein R 1 and R 2 are both ethyl, R 3 is hydrogen, and R 4 is 2-diethylaminoethylamino; leuco-1,4,5-tris[(2-diethylaminoethyl)amino]-8-hydroxyanthraquinone.
Claim 8
Dependent Claim
25 words
The compound according to claim 2 wherein R 1 is hydrogen, R 2 is ethyl, R 3 is hydroxy, and R 4 is hydrogen; leuco-1,4-bis[(2-ethylaminoethyl)amino]-5,6-dihydroxyanthraquinone.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |