Patent US2965659A successfully refreshed from Google Patents.
US2965659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluorine containing organic compounds
Assignee: 3M Co
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Filing: 1955-09-06
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Granted: 1960-12-20
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Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 George V D Tiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:20
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/263
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
THE METHOD WHICH COMPRISES REACTING TOGETHER, IN THE PRESENCE OF A FREE-RADICAL INITIATOR, PERFLUOROCARBON SULFONYL HALIDE IN WHICH THE HALIDE ATOM IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE, AND AN OLEFIN, CAPABLE OF COPOLYMERIZATION WITH ANOTHER OLEFIN UNDER FREE RADICAL INITIATION, HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO AN OLEFINIC CARBON ATOM, FREE OF CHAIN-TERMINATING RADICALS, AND HAVING THE REMAINING VALENCES OF THE OLEFINIC CARBON ATOMS SATISFIED BY A COMBINATION OF RADICALS HAVING HAMMETT SIGMA (PARA) PARAMETER VALUES WHOSE ALGEBRAIC SUM IS NOT GREATER THAN ABOUT +0.4, WITH LIBERATION OF SULFUR DIOXIDE AND FORMATION OF A PERFLUOROCARBON-RADICAL-CONTAINING SUBSTITUTED ORGANIC COMPOUND HAVING THE GENERAL STRUCTURE
Claim 2
Independent Claim
108 words
THE METHOD WHICH COMPRISES REACTING TOGETHER, IN THE PRESENCE OF A FREE-RADICAL INITIATOR, PERFLUOROCARBON SULFONYL HALIDE IN WHICH THE HALIDE ATOM IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE, AND AN OLEFIN, CAPABLE OF COPOLYMERIZATION WITH ANOTHER OLEFIN UNDER FREE RADICAL INITIATION, HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO AN OLEFINIC CARBON ATOM, FREE OF CHAIN-TERMINATING RADICALS, AND HAVING THE REMAINING VALENCES OF THE OLEFINIC CARBON ATOMS SATISFIED BY A COMBINATION OF RADICALS HAVING HAMMETT SIGMA (PARA) PARAMETER VALUES WHOSE ALGEBRAIC SUM IS NOT GREATER THAN ABOUT +0.4, WITH LIBERATION OF SULFUR DIOXIDE AND FORMATION OF A PERFLUOROCARBON-RADICAL-CONTAINING SUBSTITUTED ORGANIC COMPOUND HAVING THE GENERAL STRUCTURE
Claim 3
Dependent Claim
11 words
AS A NOVEL COMPOUND, A PERFLUOROCARBON-RADICALCONTAINING ORGANIC COMPOUND HAVING THE FORMULA
Claim 4
Dependent Claim
11 words
AS A NOVEL COMPOUND, A PERFLUOROCARBON-RADICALCONTAINING ORGANIC COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2568859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |