Patent US3987088A successfully refreshed from Google Patents.
US3987088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic carbonyl compounds
Assignee: SmithKline Beecham Corp
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Filing: 1973-03-06
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Granted: 1976-10-19
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Expires: 1993-03-06
Abstract
Abstract Certain fluorenone and anthraquinone compounds, each of which is 2-substituted by a carboxyl group or a salt, ester or optionally substituted amide thereof and each of which is optionally substituted in the 5,6-,7-or 8-position, by a second carboxyl group, salt, ester or optionally substituted amide thereof, the substitutent in the 5,6-7- or 8-position of the fluorenone compounds, also being selected from cyano, halogen, nitro, alkyl, alkoxy and acyl, are useful for the relief or prophylaxis of allergic conditions.
Inventors
- 👤 Harold Francis Hodson
- 👤 John Frederick Batchelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:05
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86; C07C; C07C205/00; C07C205/49; C07C205/57; C07C205/58; C07C49/00; C07C49/587; C07C49/647; C07C49/653; C07C51/00; C07C51/41; C07C51/412; C07C65/00; C07C65/32; C07C65/34; C07C65/36; C07C65/40; C07C66/00; C07C66/02; C07D219/00; C07D219/04; C07D219/06; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
40 words
A tricyclic compound of formula ##SPC14## wherein Z 1 is selected from a carboxyl group and a pharmaceutically acceptable carboxylate salt group; and Z 2 is an alkyl carboxylate group having 1 to 6 carbon atoms in the alkyl moiety.
Claim 2
Dependent Claim
40 words
A tricyclic compound of formula ##SPC14## wherein Z 1 is selected from a carboxyl group and a pharmaceutically acceptable carboxylate salt group; and Z 2 is an alkyl carboxylate group having 1 to 6 carbon atoms in the alkyl moiety.
Claim 3
Dependent Claim
40 words
A tricyclic compound of formula ##SPC15## wherein Z 1 is selected from a carboxyl group and a pharmaceutically acceptable carboxylate salt group; and Z 2 is an alkyl carboxylate group having 1 to 6 carbon atoms in the alkyl moiety.
Claim 4
Dependent Claim
40 words
A tricyclic compound of formula ##SPC15## wherein Z 1 is selected from a carboxyl group and a pharmaceutically acceptable carboxylate salt group; and Z 2 is an alkyl carboxylate group having 1 to 6 carbon atoms in the alkyl moiety.
Claim 5
Dependent Claim
7 words
7-n-propoxycarbonylfluorenone-2-carboxylic acid and pharmaceutically acceptable salts thereof.
Claim 6
Dependent Claim
7 words
7-n-propoxycarbonylfluorenone-2-carboxylic acid and pharmaceutically acceptable salts thereof.
Claim 7
Dependent Claim
7 words
7-n-butoxycarbonylfluorenone-2-carboxylic acid and pharmaceutically acceptable salts thereof.
Claim 8
Dependent Claim
7 words
7-n-butoxycarbonylfluorenone-2-carboxylic acid and pharmaceutically acceptable salts thereof.
Claim 9
Dependent Claim
6 words
Pharmaceutically acceptable salts of 7-carbamoylfluorenone-2-carboxylic acid.
Claim 10
Dependent Claim
6 words
Pharmaceutically acceptable salts of 7-carbamoylfluorenone-2-carboxylic acid.
Claim 11
Dependent Claim
2 words
7-Carbamoylfluorenone-2-carboxylic acid.
Claim 12
Dependent Claim
2 words
7-Carbamoylfluorenone-2-carboxylic acid.
Claim 13
Dependent Claim
17 words
Solid pharmaceutically acceptable salts of fluorenone-2,7-dicarboxylic acid having a particle size of 0.5 to 7μ in diameter.
Claim 14
Dependent Claim
17 words
Solid pharmaceutically acceptable salts of fluorenone-2,7-dicarboxylic acid having a particle size of 0.5 to 7μ in diameter.
Claim 15
Dependent Claim
12 words
The salt as claimed in claim 7 which is the calcium salt.
Claim 16
Dependent Claim
12 words
The salt as claimed in claim 7 which is the magnesium salt.
Claim 17
Dependent Claim
12 words
The salt as claimed in claim 7 which is the diammonium salt.
Claim 18
Dependent Claim
14 words
Solid disodium fluorenone-2,7-dicarboxylate having a particle size in the range of 0.5 to 7μ.
Claim 19
Dependent Claim
14 words
Solid disodium fluorenone-2,7-dicarboxylate having a particle size in the range of 0.5 to 7μ.
Claim 20
Dependent Claim
3 words
Disodium fluorenone-2,7-dicarboxylate monohydrate.
Claim 21
Dependent Claim
3 words
Disodium fluorenone-2,7-dicarboxylate monohydrate.
References Cited (Backward Citations)
US2195289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |