US4225527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyene compounds
Assignee: Hoffmann La Roche Inc
•
Filing: 1977-12-15
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Granted: 1980-09-30
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Expires: 1997-12-15
Abstract
Abstract Novel 9-(halo-substituted phenyl)-3,7-dimethyl-nona-2,4,6,8-tetraene derivatives useful in treating dermatological conditions.
Inventors
- 👤 Werner Bollag
- 👤 Rudolf Ruegg
- 👤 Gottlieb Ryser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:45
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5456; A; A61; A61P; A61P35/00; C07C; C07C45/00; C07C45/42; C07C45/43; C07C47/00; C07C47/52; C07C47/575; C07C49/00; C07C49/20; C07C49/255; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07F9/5428
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A compound of the formula: ##STR8## wherein R 3 is alkoxycarbonyl with its alkoxy moiety having 1 to 6 carbon atoms, or a salt thereof.
Claim 2
Dependent Claim
25 words
A compound of the formula: ##STR8## wherein R 3 is alkoxycarbonyl with its alkoxy moiety having 1 to 6 carbon atoms, or a salt thereof.
Claim 3
Dependent Claim
14 words
The polyene compound of claim 1 wherein said compound is 9-(2,6-dichloro-4-methoxy-5-methyl-phenyl)-3,7-dimethyl-nona-2,4,6,8-tetraen-1-oic acid ethyl ester.
Claim 4
Dependent Claim
14 words
The polyene compound of claim 1 wherein said compound is 9-(2,6-dichloro-4-methoxy-5-methyl-phenyl)-3,7-dimethyl-nona-2-cis,4-trans,6-trans,8-trans-tetraen-1-oic acid ethyl ester.
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US3950418A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |