Patent US3357992A successfully refreshed from Google Patents.
US3357992A
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Process for preparing sultones
Assignee: Hoechst AG
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Filing: 1964-07-07
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Granted: 1967-12-12
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Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Hieronymus Ernst
- 👤 Quadflieg Therese
- 👤 Wirtz Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:25
CPC Classifications
C; C07; C07C; C07C309/00; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR PREPARING A SULTONE WHICH COMPRISES HEATING AT A TEMPERATURE ABOVE 100* C. IN ABSENCE OF WATER A LOWER ALKANOYLOXY SULFONIC ACID TO SPLIT OFF A LOWER ALKYLCARBOXYLIC ACID WHICH IS DERIVED FROM THE LOWER ALKANOYLOXY MOIETY.
Claim 2
Dependent Claim
39 words
A PROCESS FOR PREPARING A SULTONE WHICH COMPRISES HEATING AT A TEMPERATURE ABOVE 100* C. IN ABSENCE OF WATER A LOWER ALKANOYLOXY SULFONIC ACID TO SPLIT OFF A LOWER ALKYLCARBOXYLIC ACID WHICH IS DERIVED FROM THE LOWER ALKANOYLOXY MOIETY.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |