1
Daniel G Anderson, David C England, Alwin S Milian Jr: Preparation of fluorocarbonyl compounds. E I Du Pont de Nemours and Company, James A Costello, November 2, 1982: US04357282 (99 worldwide citation)

Fluorinated carbonyl compounds are prepared by contacting a fluorinated methyl or ethyl ether containing at least one methoxylated carbon atom-containing group selected from: --CF.sub.2 OR.sup.3, .dbd.CFOR.sup.3, ##STR1## wherein R.sup.3 is CH.sub.3 or C.sub.2 H.sub.5, with a catalyst selected from:


2
David C England: Alkyl perfluoro-.omega.-fluoroformyl esters and monomers therefrom. E I Du Pont de Nemours and Company, February 6, 1979: US04138426 (65 worldwide citation)

Alkyl perfluoro-.omega.-fluoroformyl esters are provided which have the formula ##STR1## wherein R is alkyl of 1-6 carbon atoms, and N IS 0-6 (PREFERABLY 0).


3
Archie E Barkdoll, David C England: Contact lens having a hard center and soft, tough periphery. E I Du Pont de Nemours & Co, Anthony P Mentis, March 16, 1976: US03944347 (43 worldwide citation)

Disclosed is a segmented contact lens for the human eye constructed from fluorine-containing polymers, said lens having an index of refraction approximating that of tears and being characterized by a hard center segment surrounded by a soft tough periphery, the hard center having a Knoop hardness of ...


4
David C England: Alkyl perfluoro-.omega.-fluoroformyl esters and their preparation. E I Du Pont de Nemours and Company, December 26, 1978: US04131740 (29 worldwide citation)

Alkyl perfluoro-.omega.-fluoroformyl esters are provided which have the formula: ##STR1## wherein R is alkyl of 1-6 carbon atoms, and n is 0-6 (preferably 0). Compounds where n is 0 are prepared by contacting SO.sub.3 with a compound of the formula ROOC--CF.sub.2 --CF.sub.2 --OR.sup.1. Compounds whe ...


5
Burton C Anderson, David C England, Paul R Resnick: Polymers of dioxolanes. E I Du Pont de Nemours and Company, Frederick D Hunter, January 21, 1986: US04565855 (17 worldwide citation)

Perhalogenated dioxoles, halogenated dioxolanes, a process for making the dioxoles and dioxolanes, and polymers of dioxole and dioxolane monomers.


6
Burton C Anderson, David C England, Paul R Resnick: Cyclic monomers derived from trifluoropyruvate esters. E I Du Pont de Nemours & Co, James A Costello, January 31, 1984: US04429143 (14 worldwide citation)

Perhalogenated dioxoles, halogenated dioxolanes, a process for making the dioxoles and dioxolanes, and polymers of dioxole and dioxolane monomers.


7
Burton C Anderson, David C England, Paul R Resnick: Cyclic monomers derived from trifluoropyruvate esters, amended to polymers and polymer films from dioxoles. E I Du Pont de Nemours and Company, June 10, 1986: US04594399 (13 worldwide citation)

Perhalogenated dioxoles, halogenated dioxolanes, a process for making the dioxoles and dioxolanes, and polymers of dioxole and dioxolane monomers.


8
Burton C Anderson, David C England, Paul R Resnick: Cyclic monomers derived from trifluoropyruvate esters. E I Du Pont de Nemours and Company, James A Costello, January 29, 1985: US04496750 (12 worldwide citation)

Perhalogenated dioxoles, halogenated dioxolanes, a process for making the dioxoles and dioxolanes, and polymers of dioxole and dioxolane monomers.


9
David C England, Paul R Resnick: Fluorinated ion exchange polymer containing carboxylic groups, and film and membrane thereof. E I Du Pont de Nemours and Company, December 11, 1984: US04487668 (8 worldwide citation)

Fluorinated ion exchange polymers which have pendant side chains which contain ##STR1## groups wherein W is F or CF.sub.3, and R is an ionizable group, or which have such pendant side chains and also pendant side chains which contain sulfonyl groups, when used in the form of membranes to separate th ...


10
Alvin B Stiles, David C England: Process for oxidation of 1-propanol. E I Du Pont de Nemours and Company, January 30, 1979: US04137271 (4 worldwide citation)

Acrylic products are produced in high yields by a catalytic process in which a vaporous mixture of 1-propanol and oxygen are contacted in rapid sequence with (1) a dehydration catalyst and (2) an oxidation catalyst.