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US5023362A Expired / Lapsed US ⏱️ 0.0 years remaining

Alkyl perfluoro(2-methyl-5-oxo-3-oxahexanoate)

Assignee: EIDP Inc
•
Filing: 1987-06-19
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Granted: 1991-06-11
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Expires: 2007-06-19
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Abstract

Abstract Ketoester of the formula ##STR1## α-carboxylate-ω-acyl fluoride of the formula ##STR2## vinyl ether of the formula ##STR3## divinyl ether of the formula ##STR4## allyl ether of the formula ##STR5## and film-forming copolymers, useful as molding resins, of the vinyl ether and/or the divinyl ether or the allyl ether and a fluorinated vinyl monomer, for example, tetrafluoroethylene, wherein, in the above formulas, n is 0 to 6, p is 0 to 7, X is CO 2 M, CO 2 R, CO 2 H, CONH 2 , COF, COCl or Cn, M is alkali metal, ammonium or quaternary ammonium and R is C 1-8 alkyl, selected copolymers, after hydrolysis, being water-wettable and dyeable, exhibiting ion-exchange properties and being useful in curable fluoroelastomer compositions and, in film form, as the membrane in a chloroalkali electrolysis cell.

Inventors

  • 👤 Carl G. Krespan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 05:17
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 42 words
Compound of the formula ##STR22## wherein X is CO 2 M, CO 2 R, CO 2 H, or CN, R is alkyl of 1 to 8 carbon atoms, M is alkali metal, ammonium or quaternary ammonium and n is 1 to 6.
Claim 2
Dependent Claim 42 words
Compound of the formula ##STR22## wherein X is CO 2 M, CO 2 R, CO 2 H, or CN, R is alkyl of 1 to 8 carbon atoms, M is alkali metal, ammonium or quaternary ammonium and n is 1 to 6.
Claim 3
Dependent Claim 16 words
Compound of claim 1 wherein X is CO 2 R and R is CH 3 .
Claim 4
Dependent Claim 21 words
Compound of the formula ##STR23## wherein R is alkyl of 1 to 8 carbon atoms and n is 1 to 6.
Claim 5
Dependent Claim 21 words
Compound of the formula ##STR23## wherein R is alkyl of 1 to 8 carbon atoms and n is 1 to 6.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1994-06-10 1994-12-10 1995-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1998-06-10 1998-12-10 1999-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2002-06-10 2002-12-10 2003-06-11 $7700.00 Window Closed / Lapsed

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