Patent US3803199A successfully refreshed from Google Patents.
US3803199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of perfluoroalkyl-sulfonylaryl esters
Assignee: Bayer AG
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Filing: 1970-09-28
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Granted: 1974-04-09
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Expires: 1990-09-28
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF A PERFLUOROALKYLSULFONIC ACID ARYL ESTER COMPRISING REACTING A PERFLUOROALKYLSULFONYL FLUORIDE, WHEREIN THE ALKYL GROUP HAS UP TO ABOUT 12 CARBON ATOMS, WITH AN ARYL ESTER OF A SILICIC ACID AT A TEMPERATURE OF ABOUT 20 TO 300*C. IN THE PRESENCE OF A CATALYST. THE AMINOSUBSTITUTED-ARYL ESTERS ARE NEW COMPOUNDS ESPECIALLY USEFUL AS SURFACTANTS, TEXTILE-IMPREGNATING AGENTS, FOAM STABILIZERS, INSECTICIDES AND HERBICIDES, AND ARE ALSO CLAIMED.
Inventors
- 👤 P Voss
- 👤 H Niederprum
- 👤 V Beyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:30
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/73; C07C; C07C309/00; C07C309/63; C07C309/64; C07C309/65; C07D213/62; C07D213/63; C07D213/65; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/24; C07D215/26; C07D215/32
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |