Patent US4294822A successfully refreshed from Google Patents.
US4294822A
Expired / Lapsed
US
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5-Aminoalkyl-4,4,8-trialkylpsoralens
Assignee: Elder Thomas C Inc
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Filing: 1980-07-29
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Granted: 1981-10-13
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Expires: 2000-07-29
Abstract
Abstract The invention relates to 5'-aminoalkyl-4',4,8-trialkylpsoralens having enhanced photosensitizing activity, especially oral and topical activity, as well as low toxicity, when compared with psoralens of different structure.
Inventors
- 👤 Kurt D. Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/04; A; A61; A61P; A61P17/00; A61P27/00; A61P43/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
1 words
5'-primaryaminoloweralkyl-4',4,8-triloweralkylpsoralen.
Claim 2
Dependent Claim
1 words
5'-primaryaminoloweralkyl-4',4,8-triloweralkylpsoralen.
Claim 3
Dependent Claim
8 words
A compound of claim 1 which is 5'-aminomethyl-4',4,8-trimethylpsoralen.
Claim 4
Dependent Claim
32 words
The method of effecting photochemical sensitivity on the skin of a mammal comprising the step of orally administering to the said mammal an effective photosensitizing dose of a compound of claim 1.
Claim 5
Dependent Claim
10 words
The method of claim 3 wherein the compound is 5'-aminomethyl-4',4,8-trimethylpsoralen.
Claim 6
Dependent Claim
32 words
A pharmaceutical composition suitable for use in effecting photochemical sensitivity on the skin of a mammal comprising an effective amount of a compound of claim 1 and a pharmaceutically-acceptable carrier of diluent.
Claim 7
Dependent Claim
10 words
The composition of claim 5 wherein the compound is 5'-aminomethyl-4',4,8-trimethylpsoralen.
References Cited (Backward Citations)
US4169204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |