US3859290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-(1-(4-phenyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3h) furanones
Assignee: Sandoz AG
•
Filing: 1971-03-04
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Granted: 1975-01-07
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Expires: 1991-03-04
Abstract
Abstract WHEREIN R1 is hydrogen or alkyl of one to three carbon atoms, and R2 is hydrogen, fluorine, chlorine, bromine, alkyl of one to three carbon atoms, alkoxy of one to three carbon atoms, or an amido radical in which the alkyl group is of one to three carbon atoms, AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF. The compounds are analgesics. The invention concerns novel compounds of the formula:
Inventors
- 👤 Anton Ebnother
- 👤 Erwin Rissi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:04
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08785
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
9 words
The compound of claim 1, which is 3-(1-(4-p-flyorophenyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H) -furanone.
Claim 4
Dependent Claim
8 words
The compound of claim 1, which is dihydro-3-(4-hydroxy-1-(4-oxo-4-phenylbutyl)-4-piperidyl)-2(3H)-furanone.
Claim 5
Dependent Claim
9 words
The compound of claim 1, which is 3-(1-(4-p-bromophenyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H) -furanone.
Claim 6
Dependent Claim
9 words
The compound of claim 1, which is 3-(1-(4-p-chlorophenyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H) -furanone.
Claim 7
Dependent Claim
9 words
The compound of claim 1, which is 3-(1-(4-m-fluorophenyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H) -furanone.
Claim 8
Dependent Claim
8 words
The compound of claim 1, which is dihydro-3-(4-hydroxy-1-(4-oxo-4-o-tolylbutyl)-4-piperidyl)-2(3H)-furanone.
Claim 9
Dependent Claim
8 words
The compound of claim 1, which is dihydro-3-(4-hydroxy-1-(4-oxo-4-m-tolylbutyl)-4-piperidyl)-2(3A-furanone.
Claim 10
Dependent Claim
8 words
The compound of claim 1, which is 3-(1-(4-o-anisyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H)-furanone.
Claim 11
Dependent Claim
8 words
The compound of claim 1, which is 3-(1-(4-p-anisyl-4-oxobutyl)-4-hydroxy-4-piperidyl)dihydro-2(3H)-furanone.
Claim 12
Dependent Claim
8 words
The compound of claim 1, which is dihydro-3-(4-hydroxy-1-(4-oxo-4-p-tolylbutyl)-4-piperidyl)-2(3H)-furanone.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |