US3689485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 3,4-dihydro-1,2,3-oxathiazin-4-ones
Assignee: Hoechst AG
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Filing: 1971-01-07
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Granted: 1972-09-05
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Expires: 1991-01-07
Abstract
Abstract 3,4-DIHYDRO-1,2,3-OXATHIAZINONES ARE OBTAINED WHEN REACTING KETONES WITH ARYLOXYSULFONYL ISOCYANATES. THE COMPOUNDS HAVING LOW-MOLECULAR SUBSTITUENTS ARE ARTIFICIAL SWEETENING AGENTS AND THE DERIVATIVES HAVING HYDROPHOBIC SUBSTITUENTS ARE INTERFACIAL ACTIVE AGENTS. ALL OF THE NEW COMPOUNDS ARE ORGANIC INTERMEDIATES HAVING A PLURALITY OF REACTIVE GROUPS.
Inventors
- 👤 Karl Clauss
- 👤 Gerhard Lohaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:28
CPC Classifications
C; C07; C07D; C07D291/00; C07D291/02; C07D291/06
Claims Analysis
Total Claims: 0
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |