Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2007-08-06
2010-06-15
Keys, Rosalynd (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C106S014050, C514S723000, C252S079100, C510S506000
Reexamination Certificate
active
07737307
ABSTRACT:
A compound comprising Formula I, or a mixture thereof,in-line-formulae description="In-line Formulae" end="lead"?Rf—OCFHCF2O—[CH2CH2O]x—[C3H7O]y-A Formula Iin-line-formulae description="In-line Formulae" end="tail"?whereinRfis CnF2n+1,n is 1 to about 6,x is a mixture of positive integers and is 4 or greater,y is 0 to about 4, provided that the ratio of y to x is equal to or less than 0.25,A is RfOCHFCF2or CmH2m+1, andm is 1 to about 24and its use in lowering surface tension and imparting improved surface effects is disclosed.
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Chi et al., A Facile Synthesis of Partly-fluorinated Ethers Using Perfluoropropoxyethylene and Aliphatic Alcohols, Bull. Korean Chem. Soc. (1999), vol. 20, No. 2, 220-222.
Feiring Andrew Edward
McLain Stephan James
Murphy Peter Michael
Sinks Jessica
E. I. du Pont de Nemours and Company
Keys Rosalynd
Mayer Nancy S.
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