Patent US3904647A successfully refreshed from Google Patents.
US3904647A
Expired / Lapsed
US
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Thioxanthone carboxylic acids and derivatives
Assignee: Syntex USA LLC
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Filing: 1972-11-21
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Granted: 1975-09-09
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Expires: 1992-11-21
Abstract
Abstract Compositions containing and methods employing, as the essential ingredient, thioxanthone carboxylic acid compounds which are useful in the treatment of allergic conditions. Methods for preparing these compounds and compositions are also disclosed. Thioxanthone-2-carboxylic acid and 7-methoxy-thioxanthone-2carboxylic acid are illustrated as representative of the class.
Inventors
- 👤 Jurg R Pfister
- 👤 Ian T Harrison
- 👤 John H Fried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
C; C07; C07C; C07C317/00; C07D; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/14; C07D335/16; C07C323/00; C07D409/00; C07D409/02; C07D409/04; C07D409/06; C07D409/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
10 words
A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING FORMULAS:
Claim 2
Dependent Claim
10 words
A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING FORMULAS:
Claim 3
Dependent Claim
9 words
A compound according to claim 1 of formula (A).
Claim 4
Dependent Claim
9 words
A compound according to claim 1 of formula (B).
Claim 5
Dependent Claim
9 words
A compound according to claim 1 of formula (C).
Claim 6
Dependent Claim
11 words
A compound according to claim 4 wherein R is the group
Claim 7
Dependent Claim
11 words
A compound according to claim 4 wherein R is the group
Claim 8
Dependent Claim
11 words
A compound according to claim 4 wherein R Is the group
Claim 9
Dependent Claim
11 words
A compound according to claim 4 wherein R is the group
Claim 10
Dependent Claim
9 words
A compound according to claim 1 of formula (D).
Claim 11
Dependent Claim
10 words
The compound according to claim 1 which is 7-(1-hydroxyethyl)-thioxanthone-2-carboxylic acid.
Claim 12
Dependent Claim
10 words
The compound according to claim 1 which is 7-(acetyl)-thioxanthone-2-carboxylic acid.
Claim 13
Dependent Claim
10 words
The compound according to claim 1 which is 7-(methylsulfinyl)-thioxanthone-2-carboxylic acid.
Claim 14
Dependent Claim
10 words
The compound according to claim 1 which is 7-(methylsulfonyl)-thioxanthone-2-carboxylic acid.
Claim 15
Dependent Claim
9 words
The sodium salts of the compounds of claim 1.
Claim 16
Dependent Claim
25 words
A compound selected from the group consisting of: 5-isopropyl-7-(acetyl)-thioxanthone-2-carboxylic acid, 5-isopropoxy-7-(acetyl)-thioxanthone-2-carboxylic acid, 5-isopropyl-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid, 5-isopropoxy-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid, 5-acetyl-7-(isopropyl)-thioxanthone-2-carboxylic acid, 5-acetyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid, 5-methylsulfinyl-7-(isopropyl)-thioxanthone-2-carboxylic acid, and 5-methylsulfinyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid.
Claim 17
Dependent Claim
25 words
A compound selected from the group consisting of: 5-isopropyl-7-(acetyl)-thioxanthone-2-carboxylic acid, 5-isopropoxy-7-(acetyl)-thioxanthone-2-carboxylic acid, 5-isopropyl-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid, 5-isopropoxy-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid, 5-acetyl-7-(isopropyl)-thioxanthone-2-carboxylic acid, 5-acetyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid, 5-methylsulfinyl-7-(isopropyl)-thioxanthone-2-carboxylic acid, and 5-methylsulfinyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid.
Claim 18
Dependent Claim
10 words
The compound according to claim 15 which is 5-isopropyl-7-(acetyl)-thioxanthone-2-carboxylic acid.
Claim 19
Dependent Claim
10 words
The compound according to claim 15 which is 5-isopropoxy-7-(acetyl)-thioxanthone-2-carboxylic acid.
Claim 20
Dependent Claim
10 words
The compound according to claim 15 which is 5-isopropyl-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid.
Claim 21
Dependent Claim
10 words
The compound according to claim 15 which is 5-isopropoxy-7-(methylsulfinyl)-thioxanthone-2-carboxylic acid.
Claim 22
Dependent Claim
10 words
The compound according to claim 15 which is 5-acetyl-7-(isopropyl)-thioxanthone-2-carboxylic acid.
Claim 23
Dependent Claim
10 words
The compound according to claim 15 which is 5-acetyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid.
Claim 24
Dependent Claim
10 words
The compound according to claim 15 which is 5-methylsulfinyl-7-(isopropyl)-thioxanthone-2-carboxylic acid.
Claim 25
Dependent Claim
10 words
The compound according to claim 15 which is 5-methylsulfinyl-7-(isopropoxy)-thioxanthone-2-carboxylic acid.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |