US2961470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyfluoroalkanethiols
Assignee: EIDP Inc
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Filing: 1959-03-04
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Granted: 1960-11-22
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 William A Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2406; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
PROCESS FOR PREPARING A POLYFULOROALKANETHIOL WHICH COMPRISES BRINGING INTO CONTACT AND REACTING, AT A TEMPERATURE WHITHIN THE RANGE OF 150* TO 300*C. HYDROGEN SULFIDE WITH A POLYFLUORO COMPOUND HAVING THE FORMULA Y-R-COZ WHEREIN Y IS SELECTED FROM THE CLASS CONSISTING OF H,F AND -COZ, R IS A STRAIGHT CHAIN PERFLUOROALKYLENE RADICAL OF FROM 1-18 CARBON ATOMS AND Z IS SELECTED FROM THE CLASS CONSISTING OF OH AND C1, UNDER A PRESSURE AT LEAST EQUAL TO THE AUTOGENOUS PRESSURE OF THE REACTANTS, WITH THE PROVISO THAT WHEN THE OPERATING PRESSURE IS LESS THAN 1000 ATMOSPHERES, SAID HYDROGEN SULFIDE AND POLYFLUORO COMPOUND ARE REACTED IN CONTACT WITH A SULFACTIVE HYDROGENATION CATALYST AND OBTAINING AS A RESULTING PRODUCT A POLYFLUOROALKANETHIOL HAVING THE FORMULA X-R-CH2SH WHEREIN X IS SELECTED FROM THE CLASS CONSISTING OF H, F AND -CH2SH AND R IS DEFINED AS AFORESAID.
Claim 2
Dependent Claim
140 words
PROCESS FOR PREPARING A POLYFULOROALKANETHIOL WHICH COMPRISES BRINGING INTO CONTACT AND REACTING, AT A TEMPERATURE WHITHIN THE RANGE OF 150* TO 300*C. HYDROGEN SULFIDE WITH A POLYFLUORO COMPOUND HAVING THE FORMULA Y-R-COZ WHEREIN Y IS SELECTED FROM THE CLASS CONSISTING OF H,F AND -COZ, R IS A STRAIGHT CHAIN PERFLUOROALKYLENE RADICAL OF FROM 1-18 CARBON ATOMS AND Z IS SELECTED FROM THE CLASS CONSISTING OF OH AND C1, UNDER A PRESSURE AT LEAST EQUAL TO THE AUTOGENOUS PRESSURE OF THE REACTANTS, WITH THE PROVISO THAT WHEN THE OPERATING PRESSURE IS LESS THAN 1000 ATMOSPHERES, SAID HYDROGEN SULFIDE AND POLYFLUORO COMPOUND ARE REACTED IN CONTACT WITH A SULFACTIVE HYDROGENATION CATALYST AND OBTAINING AS A RESULTING PRODUCT A POLYFLUOROALKANETHIOL HAVING THE FORMULA X-R-CH2SH WHEREIN X IS SELECTED FROM THE CLASS CONSISTING OF H, F AND -CH2SH AND R IS DEFINED AS AFORESAID.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |