US5087776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New perfluoroalkanes obtained by photochemical fluorination and use thereof as polymerization initiators
Assignee: Syensqo Specialty Polymers Italy SpA
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Filing: 1991-02-06
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Granted: 1992-02-11
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Expires: 2011-02-06
Abstract
Abstract The present invention relates to branched perfluoroalkanes which, having bonds between a quaternary carbon atom and a tertiary carbon atom, easily undergo a homolytic scission of the C--C bond thereby releasing (non-persistent) radicals which may be used as initiators of polymerization of ethylenically unsaturated monomers. A further object of the present invention are new perfluoroalkanes having at least 9 carbon atoms belonging to the above described group.
Inventors
- 👤 Claudio Tonelli
- 👤 Vito Tortelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:06
CPC Classifications
C; C08; C08F; C08F4/00; C07; C07C; C07C17/00; C07C17/013; C07C17/04; C07C19/00; C07C19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
Branched perfluoroalkanes having the following formulas: ##STR13##
Claim 2
Dependent Claim
7 words
Branched perfluoroalkanes having the following formulas: ##STR13##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |