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Patent US3950418A successfully refreshed from Google Patents.
US3950418A
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Vitamin A acid amides
Assignee: Hoffmann La Roche Inc
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Filing: 1974-09-23
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Granted: 1976-04-13
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Expires: 1994-09-23
Abstract
Abstract Novel vitamin A acid amides and compositions thereof which are useful for the topical or systemic treatment of dermatological disorders.
Inventors
- 👤 Werner Bollag
- 👤 Rudolf Ruegg
- 👤 Gottlieb Ryser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:40
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/20; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
A compound represented by the formula ##EQU4## wherein R 1 is a lower alkoxy alkyl group and R 2 is hydrogen.
Claim 2
Dependent Claim
21 words
A compound represented by the formula ##EQU4## wherein R 1 is a lower alkoxy alkyl group and R 2 is hydrogen.
Claim 3
Dependent Claim
14 words
The compound of claim 1 wherein said compound is vitamin A acid 2-methoxyethyl amide.
Claim 4
Dependent Claim
21 words
A compound represented by the formula ##EQU5## wherein R 1 is a hydroxy lower alkyl group and R 2 is hydrogen.
Claim 5
Dependent Claim
21 words
A compound represented by the formula ##EQU5## wherein R 1 is a hydroxy lower alkyl group and R 2 is hydrogen.
Claim 6
Dependent Claim
14 words
The compound of claim 3 wherein said compound is vitamin A acid ethanol amide.
Claim 7
Dependent Claim
20 words
A compound represented by the formula ##EQU6## wherein R 1 is a lower alkylaminoalkyl group and R 2 is hydrogen.
Claim 8
Dependent Claim
20 words
A compound represented by the formula ##EQU6## wherein R 1 is a lower alkylaminoalkyl group and R 2 is hydrogen.
Claim 9
Dependent Claim
14 words
The compound of claim 5 wherein said compound is vitamin A acid 2-diethylaminoethyl amide.
Claim 10
Dependent Claim
20 words
A compound represented by the formula ##EQU7## wherein R 1 is a hydroxy-lower alkylcyclohexyl group and R 2 is hydrogen.
Claim 11
Dependent Claim
20 words
A compound represented by the formula ##EQU7## wherein R 1 is a hydroxy-lower alkylcyclohexyl group and R 2 is hydrogen.
Claim 12
Dependent Claim
15 words
The compound of claim 7 wherein said compound is vitamin A acid 2-hydroxyethyl cyclohexyl amide.
References Cited (Backward Citations)
US2951853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |