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US3591584A Expired / Lapsed US ⏱️ 0.0 years remaining

Benzothiazine dioxides

Assignee: Pfizer Inc
•
Filing: 1968-08-27
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Granted: 1971-07-06
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Expires: 1988-08-27
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Abstract

Abstract A SERIES OF NOVEL 3,4-DIHYDRO-4-OXO-2H-1,2-BENZOTHIAZINE-3-CARBOXAMIDE 1,1-DIOXIDES AND 3,4-DIHYDRO-3-OXO2H - 1,2-BENZOTHIAZINE-4-CARBOXAMIDE, 1,1-DIOXIDES HAVE BEEN PREPARED, INCLUDING 3,4-DIHYDRO-2-METHYL-4-OXO-2H1,2-BENZOTHIANZINE-3-CARBOXANILIDE 1,1-DIOXIDE, 3,4-DIHYDRO - 2 - METHYL-4-OXO-N-(2-THIAZOYL)-IH-1,2-BENZOTHIAZINE-3-CARBOXAMIDE 1,1-DIOXIDE, 2'',4-DICHLORO-3,4-DIHYDRO2 - METHYL - 3 - OXO-2H-1,2-BENZOTHIAZINE-4-CARBOXANILIDE 1,1-DIOXIDE AND 4''-BROMO-3,4-DIHYDRO-2-METHYL-3-OXO-2H1,2-BENZOTHIAZINE-4-CARBOXANILIDE 1,1-DIOXIDE. ALL THESE COMPOUNDS ARE USEFUL IN THERAPY AS NON-STEROIDAL ANTIINFLAMMATORY AGENTS. ALTERNATE METHODS OF PREPARATION ARE PROVIDED AND SOME OF THESE SYNTHETIC ROUTES ARE DESCRIBED IN GREAT DETAIL.

Inventors

  • 👤 Joseph G Lombardino

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 23:28
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/5415; C; C07; C07D; C07D279/00; C07D279/02

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-07-05 1975-01-04 1975-07-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-07-05 1979-01-04 1979-07-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-07-05 1983-01-04 1983-07-06 $7700.00 Window Closed / Lapsed

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