US3668241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 1-oxoinden-5-yloxy alkanoic acids
Assignee: Merck and Co Inc
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Filing: 1968-11-25
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Granted: 1972-06-06
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Expires: 1988-11-25
Abstract
Abstract (1-Oxoinden-5-yloxy)- and (1-Oxoinden-5-ylthio)-alkanoic acid products and salts, esters and amide derivatives thereof wherein the 1-oxoindenyl ring may be substituted by various radicals are disclosed. The said products are diuretic and saluretic agents. The products may be prepared by three routes: (1) via the dehydrohalogenation of a (1-oxo-2-halo-5-indanyloxy(or thio))alkanoic acid; (2) via the etherification of a 5-hydroxy-(or mercapto)inden-1-one; or (3) via the hydrolysis of a (1-oxoinden5-yloxy-(or thio))alkanoic acid ester.
Inventors
- 👤 Edward J Cragoe Jr
- 👤 Otto W Woltersderf Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:22
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/587; C07C49/703; C07C49/747; C07C323/00; C07C45/00; C07C45/61; C07C45/63; C07C45/65; C07C45/67
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
The compound of claim 2 wherein R1 is hydrogen and X1 and X2 represent halo.
Claim 2
Dependent Claim
18 words
The compound of claim 2 wherein R is ethyl, R1 is hydrogen, and X1 and X2 are chloro.
Claim 3
Dependent Claim
16 words
The compound of claim 2 wherein R1 is hydrogen, X1 is hydrogen and X2 is halo.
Claim 4
Dependent Claim
19 words
The compound of claim 2 wherein R is ethyl, R1 is hydrogen, X1 is hydrogen and X2 is bromo.
Claim 5
Dependent Claim
19 words
The compound of claim 2 wherein R is ethyl; R1 is hydrogen; X1 is chloro and X2 is hydrogen.
Claim 6
Dependent Claim
18 words
The compound of claim 2 wherein R is methyl; R1 is hydrogen and X1 and X2 are chloro.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |