US3923801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxazinobenzothiazine 6,6-dioxides
Assignee: Janssen Pharmaceuticals Inc
•
Filing: 1974-09-23
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Granted: 1975-12-02
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Expires: 1994-09-23
Abstract
Abstract 5-Alkyl-3-aryl-2H,5H-1,3-oxazino-(5,6-c) 1,2-benzothiazine2,4(3H)-dione 6,6-dioxides are disclosed. The compounds have anti-inflammatory properties and are useful as components of antiarthritic compositions. Also included are novel intermediates used in the synthesis of said benzothiazine dioxides.
Inventors
- 👤 Chris Royce Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:59
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C07D279/00; C07D279/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
10 words
A compound according to claim 1 which is 5-methyl-3-phenyl-2H,5H-1,3-oxazino(5,6-c)1,2-benzothiazine-2,4(3H)-dione 6,6-dioxide.
Claim 4
Dependent Claim
6 words
A compound represented by the formula:
Claim 5
Dependent Claim
6 words
A compound represented by the formula:
Claim 6
Dependent Claim
16 words
A compound according to claim 3 which is ethyl N-(4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carbonyl) carbanilate 1,1-dioxide, sodium derivative, 1,2-dimethoxyethane solvate.
Claim 7
Dependent Claim
16 words
A compound according to claim 3 which is ethyl N-(4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carbonyl)carbanilate 1,1-dioxide, sodium derivative, dioxane solvate, hemihYdrate.
References Cited (Backward Citations)
US3646020A
Cited
US3853862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |