Patent US4254044A successfully refreshed from Google Patents.
US4254044A
Expired / Lapsed
US
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7-Oxabicycloheptane- and 7-oxabicycloheptene compounds
Assignee: ER Squibb and Sons LLC
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Filing: 1980-03-07
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Granted: 1981-03-03
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Expires: 2000-03-07
Abstract
Abstract New compounds having the general formula ##STR1## are useful as cardiovascular agents, and as intermediates for the preparation of compounds having the general formula ##STR2## wherein R 1 is hydrogen or lower alkyl; R 2 is --CHO--, CH 2 OH or --CH═CH--R 3 --lower alkylene--CH 3 ; and R 3 is keto or hydroxymethyl.
Inventors
- 👤 Peter W. Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A compound having the formula ##STR24## wherein the dotted line is an optional double bond.
Claim 2
Dependent Claim
15 words
A compound having the formula ##STR24## wherein the dotted line is an optional double bond.
Claim 3
Dependent Claim
11 words
A compound in accordance with claim 1 having the formula ##STR25##
Claim 4
Dependent Claim
11 words
A compound in accordance with claim 1 having the formula ##STR26##
Claim 5
Dependent Claim
8 words
The compound in accordance with claim 2, (exo)-3-(2-methoxyethenyl)-7-oxabicyclo[2.2.1]heptane-2-methanol.
Claim 6
Dependent Claim
8 words
The compound in accordance with claim 2, (endo)-3-(2-methoxyethenyl)-7-oxabicyclo[2.2.1]heptane-2-methanol.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |