US4495104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quinone carboxylic acids and ester derivatives
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1980-07-11
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Granted: 1985-01-22
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Expires: 2000-07-11
Abstract
Abstract A compound of the general formula ##STR1## wherein n is an integer of 10 to 21, inclusive; R is H or lower alkyl having 1 to 4 carbon atoms has pharmaceutical activities such as hypotensive, tissue metabolism stimulating, immuno-regulatory, lysosomal membrane stabilizing and SRS-A production inhibitory activities and is useful as a heart failure remedy, cerebral circulation disturbance remedy, immuno-regulator, and antiallergic drug.
Inventors
- 👤 Isuke Imada
- 👤 Tetsuya Okutani
- 👤 Masazumi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:24
CPC Classifications
C; C07; C07C; C07C66/00; A; A61; A61P; A61P25/00; A61P25/28; A61P37/00; A61P37/08; A61P9/00; C07C41/00; C07C41/48; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C46/00; C07C46/02; C07C46/06; C07C46/08; C07C50/00; C07C50/26; C07C50/28; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C59/76; C07C59/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
A compound of the formula ##STR11## wherein n is an integer of 10 to 21, inclusive, and R is hydrogen or alkyl having 1 to 4 carbon atoms.
Claim 2
Dependent Claim
28 words
A compound of the formula ##STR11## wherein n is an integer of 10 to 21, inclusive, and R is hydrogen or alkyl having 1 to 4 carbon atoms.
Claim 3
Dependent Claim
11 words
A compound as claimed in claim 1, wherein R is hydrogen.
Claim 4
Dependent Claim
18 words
A compound as claimed in claim 1, wherein R is an alkyl having 1 to 4 carbon atoms.
Claim 5
Dependent Claim
16 words
A compound as claimed in claim 1, wherein n is an integer of 13 to 18.
Claim 6
Dependent Claim
12 words
A compound as claimed in claim 1, wherein the compound is 2,3-dimethoxy-6-(12-methoxycarbonyldodecyl)-5-methyl-1,4-benzoquinone.
Claim 7
Dependent Claim
12 words
A compound as claimed in claim 1, wherein the compound is 6-(21-carboxyheneicosyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone.
Claim 8
Dependent Claim
12 words
A compound as claimed in claim 1, wherein the compound is 6-(17-carboxyheptadecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone.
Claim 9
Dependent Claim
12 words
A compound as claimed in claim 1, wherein the compound is 6-(12-carboxydodecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone.
Claim 10
Dependent Claim
12 words
A compound as claimed in claim 1, wherein the compound is 6-(15-carboxypentadecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |