US4428882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(Aminoalkylamino)-5,8-dihydroxy-4-substituted-anthraquinones
Assignee: Wyeth Holdings LLC
•
Filing: 1982-02-24
•
Granted: 1984-01-31
•
Expires: 2002-02-24
Abstract
Abstract This disclosure describes 1-(aminoalkylamino)-5,8-dihydroxy-4-substituted-anthraquinones useful as chelating agents and for inhibiting the growth of transplanted mouse tumors.
Inventors
- 👤 Keith C. Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A compound selected from the group consisting of those of the formula: ##STR6## wherein n is an integer from 2 to 4, inclusive, and m is an integer from 2 to 4, inclusive; the leuco bases and tautomers thereof; and the pharmacologically acceptable acid-addition salts thereof.
Claim 2
Dependent Claim
46 words
A compound selected from the group consisting of those of the formula: ##STR6## wherein n is an integer from 2 to 4, inclusive, and m is an integer from 2 to 4, inclusive; the leuco bases and tautomers thereof; and the pharmacologically acceptable acid-addition salts thereof.
Claim 3
Dependent Claim
15 words
The compound according to claim 1 wherein n is 2 and m is 2; 1-[2-(2-hydroxyethylamino)-ethylamino]-4-amino-5,8-dihydroxyanthraquinone.
Claim 4
Dependent Claim
15 words
The compound according to claim 1 wherein n is 2 and m is 2; leuco-1-[2-(2-hydroxythylamino)ethylamino]-4-amino-5,8-dihydroxyanthraquinone.
References Cited (Backward Citations)
US3123605A
Cited
US4138415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |