US3780030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2,3-benzoxathiazin-4(3h)-one 2-oxides and their preparation
Assignee: Dow Chemical Co
•
Filing: 1971-10-29
•
Granted: 1973-12-18
•
Expires: 1991-10-29
Abstract
Abstract 1,2,3-BENZOXATHIAZIN-4(3H)-ONE 2-OXIDES CORRESPONDING TO THE FORMULA 2,4-DI(O=),3-R,R''-3,4-DIHYDRO-1,2,3-BENZOXATHIAZINE WHEREIN R REPRESENTS H, PHENYL, HALOPHENYL, NITROPHENYL, OR HALONITROPHENYL AND R'' REPRESENTS H, HALO, DIHALO, OR PHENYL. THE COMPOUNDS ARE PREPARED BY REACTING A CORRESPONDING SALICYLAMIDE OR SALICYLANILIDE WITH THIONYL CHLORIDE, ADVANTAGEOUSLY IN THE PRESENCE OF A SOLVENT SUCH AS BENZENE OR METHYLENE CHLORIDE AND, IF DESIRED, IN THE PRESENCE OF AN ACID ACCEPTOR SUCH AS PYRIDINE OR A LOWER TRIALKYLAMINE. THE COMPOUNDS ARE USEFUL AS PESTICIDES.
Inventors
- 👤 L Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
C; C07; C07D; C07D291/00; C07D291/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |