Patent US3284450A successfully refreshed from Google Patents.
US3284450A
Expired / Lapsed
US
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Cyclized o-carboxybenzenesulfonic acid derivatives and method of preparing the same
Assignee: Nederlandsche Combinatie voor Chemische Industrie NV
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Filing: 1963-09-16
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Granted: 1966-11-08
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Kraaijeveld Adriaan
- 👤 Antony M Akkerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
C; C07; C07D; C07D275/00; C07D275/04; C07D275/06; A; A61; A61K; A61K31/00; A61K31/33; C07D279/00; C07D279/02; C07D417/00; C07D417/02; C07D417/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A COMPOUND HAVING THE FORMULA: 1,1,3-TRI(O=),2-(R-CO-CH2-),X,CL-2,3-DIHYDRO-1,2IN WHICH: X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND THE SULFAMOYL GROUP, AND R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO THREE CARBON ATOMS, BIPHENYL, PHENYL SUBSTITUTED BY HALOGEN HAVING A MAXIMUM ATOMIC WEIGHT OF 80, AND 1,3-BENZODIOXOLE.
Claim 2
Dependent Claim
50 words
A COMPOUND HAVING THE FORMULA: 1,1,3-TRI(O=),2-(R-CO-CH2-),X,CL-2,3-DIHYDRO-1,2IN WHICH: X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND THE SULFAMOYL GROUP, AND R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO THREE CARBON ATOMS, BIPHENYL, PHENYL SUBSTITUTED BY HALOGEN HAVING A MAXIMUM ATOMIC WEIGHT OF 80, AND 1,3-BENZODIOXOLE.
Claim 3
Dependent Claim
107 words
COMPOUNDS HAVING THE FORMULA: 1,1,4-TRI(O=),2-R1,3-(R-CO-),X,CL-3,4-DIHYDRO-2H-1,2BENZOISOTHIAZOLE BENZOTHIAZINE IN WHICH: X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND THE SULFAMOYL GROUP; R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO 12 CARBON ATOMS, PHENYL-LOWER-ALKYL, PHENYL, BIPHENYL, PHENYL SUBSTITUTED BY HALOGEN HAVING A MAXIMUM ATOMIC WEIGHT OF 80, PHENYL SUBSTITUTED BY A MAXIMUM OF TWO ALIPHATIC ETHER FUNCTIONS IN WHICH A MAXIMUM OF 2 CARBON ATOMS ARE INVOLVED, AND CYCLOALKYL AND CYCLOALKYL-ALKYL CONTAINING UP TO 8 CARBON ATOMS; AND R1 IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, AND ALKYL, ALKENYL, ALKYNYL, ARALKYL, AND KETO-SUBSTITUED ALKYL AND ARALKYL RADICALS, CONTAINING UP TO 9 CARBON ATOMS.
Claim 4
Dependent Claim
107 words
COMPOUNDS HAVING THE FORMULA: 1,1,4-TRI(O=),2-R1,3-(R-CO-),X,CL-3,4-DIHYDRO-2H-1,2BENZOISOTHIAZOLE BENZOTHIAZINE IN WHICH: X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND THE SULFAMOYL GROUP; R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO 12 CARBON ATOMS, PHENYL-LOWER-ALKYL, PHENYL, BIPHENYL, PHENYL SUBSTITUTED BY HALOGEN HAVING A MAXIMUM ATOMIC WEIGHT OF 80, PHENYL SUBSTITUTED BY A MAXIMUM OF TWO ALIPHATIC ETHER FUNCTIONS IN WHICH A MAXIMUM OF 2 CARBON ATOMS ARE INVOLVED, AND CYCLOALKYL AND CYCLOALKYL-ALKYL CONTAINING UP TO 8 CARBON ATOMS; AND R1 IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, AND ALKYL, ALKENYL, ALKYNYL, ARALKYL, AND KETO-SUBSTITUED ALKYL AND ARALKYL RADICALS, CONTAINING UP TO 9 CARBON ATOMS.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |