US3335137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing substituted 2-(21-arylsulphonyl aminophenyl)-4h, 3, 1-benzoxazin-4-ones
Assignee: VNII KHIM REAKTIVOV I OSOBO CH
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Filing: 1964-11-17
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Granted: 1967-08-08
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Bolotin Boris Markovich
- 👤 Kurnosova Ljudmila Stepanovna
- 👤 Koroljkova Oljga Nickolaevna
- 👤 Drapkina Dora Alexandrovna
- 👤 Terskoi Jaroslav Anatoljevich
- 👤 Sinjaver Leonid Grigorjevich
- 👤 Brudz Vitaly Grigorjevich
- 👤 Jarovaja Galina Dmitrievna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:07
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PROCESS FOR MANUFACTURING SUBSTITUTED 2-(21-ARYLSULPHONYLAMINOPHENYL)-4H,3,1-BENZOXAZIN-4-ONS, SAID PROCESS COMPRISING CONDENSING ANTHRANILIC ACID AND AN ARYLSULPHONYLCHLORIDE IN THE PRESENCE OF PYRIDINE.
Claim 2
Dependent Claim
20 words
A PROCESS FOR MANUFACTURING SUBSTITUTED 2-(21-ARYLSULPHONYLAMINOPHENYL)-4H,3,1-BENZOXAZIN-4-ONS, SAID PROCESS COMPRISING CONDENSING ANTHRANILIC ACID AND AN ARYLSULPHONYLCHLORIDE IN THE PRESENCE OF PYRIDINE.
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |