Patent US2894991A successfully refreshed from Google Patents.
US2894991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroalkyl sulfur compounds
Assignee: Pennwalt Corp
•
Filing: 1956-12-10
•
Granted: 1959-07-14
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 John T Barr
- 👤 Francis E Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:55
CPC Classifications
C; C07; C07C; C07C323/00; Y; Y10; Y10S; Y10S252/00; Y10S252/964
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A COMPOUND HAVING THE FORMULA R1CH2SXY IN WHICH Y IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND RF''CH2; RF AND RF'' ARE EACH A PERFLUOROALKYL GROUP WITH FROM 1 TO 6 CARBON ATOMS; X IS 1 WHEN Y IS HYDROGEN; AND X IS A SMALL INTERGER WHEN Y IS RF''CH2.
Claim 2
Dependent Claim
51 words
A COMPOUND HAVING THE FORMULA R1CH2SXY IN WHICH Y IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND RF''CH2; RF AND RF'' ARE EACH A PERFLUOROALKYL GROUP WITH FROM 1 TO 6 CARBON ATOMS; X IS 1 WHEN Y IS HYDROGEN; AND X IS A SMALL INTERGER WHEN Y IS RF''CH2.
Claim 3
Dependent Claim
58 words
THE METHOD FOR THE PREPARATION OF A COMPOUND HAVING THE FORMULA RFCH2SXY AS DEFINED IN CLAIM 1 WHICH COMPRISES REACTING A 1,1-DIHYDROPERFLUOROALKYL TOSYLATE HAVING THE FORMULA C6H4CH3SO3CH2RF IN WHICH RF IS A PERFLUOROALKYL GROUP WITH 1 TO 6 CARBON ATOMS WITH AN INORGANIC SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SULFIDES AND ALKALI METAL THIOSULFATES.
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) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |