Patents by Inventor Theodore A. Treat

Theodore A. Treat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • High build dispersions
    Patent number: 7619039
    Abstract: An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2.225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1.5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: November 17, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Clay Woodward Jones, Robert John Cavanaugh, Walter Thomas Krakowiak, Richard A. Morgan, Theodore A. Treat
  • High build dispersions
    Publication number: 20060189765
    Abstract: An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2.225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1.5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.
    Type: Application
    Filed: April 19, 2006
    Publication date: August 24, 2006
    Inventors: Clay Jones, Robert Cavanaugh, Walter Krakowiak, Richard Morgan, Theodore Treat
  • Concentrated fluoropolymer dispersions
    Patent number: 6956078
    Abstract: An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.225 and about 2 to about 11 weight % surfactant based on the weight of said fluoropolymer comprising a compound or mixture of compounds of the formula: R(OCH2CH2)nOH wherein R is a branched alkyl, branched alkenyl, cycloalkyl, or cycloalkenyl hydrocarbon group having 8-18 carbon atoms and n is an average value of 5 to 18. The fluoropolymer particles of the dispersion comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. Preferably, the aqueous dispersion composition comprises about 45 to about 65 weight % non-melt-processible fluoropolymer particles.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: October 18, 2005
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robert John Cavanaugh, Clay Woodward Jones, Kazuo Konabe, Daniel N. Levy, Philippe Andre Fernand Thomas, Theodore A. Treat
  • Fluoropolymer interlayer dielectric by chemical vapor deposition
    Patent number: 6855370
    Abstract: A process is disclosed for forming a fluoropolymer layer on a thin film device, comprising contacting said thin film device with a gas phase fluoromonomer, and initiating polymerization of said fluoromonomer with a free radical polymerization initiator whereby said fluoromonomer polymerizes to form said fluoropolymer layer on said thin film device.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: February 15, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michael Mocella, Andrew E. Feiring, Theodore A. Treat, Yakov Brichko, Eugene Lopata, Peter Rose
  • Concentrated fluoroploymer dispersions
    Publication number: 20030130393
    Abstract: An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.
    Type: Application
    Filed: March 13, 2002
    Publication date: July 10, 2003
    Inventors: Robert John Cavanaugh, Clay Woodward Jones, Kazuo Konabe, Daniel N. Levy, Philippe Andre Fernand Thomas, Theodore A. Treat
  • High build dispersions
    Publication number: 20030008944
    Abstract: An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2.225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1.5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.
    Type: Application
    Filed: March 13, 2002
    Publication date: January 9, 2003
    Inventors: Clay Woodward Jones, Robert John Cavanaugh, Walter Krakowiak, Richard A. Morgan, Theodore A. Treat
  • Fluoropolymer interlayer dielectric by chemical vapor deposition
    Publication number: 20020182321
    Abstract: A process is disclosed for forming a fluoropolymer layer on a thin film device, comprising contacting said thin film device with a gas phase fluoromonomer, and initiating polymerization of said fluoromonomer with a free radical polymerization initiator whereby said fluoromonomer polymerizes to form said fluoropolymer layer on said thin film device.
    Type: Application
    Filed: May 2, 2002
    Publication date: December 5, 2002
    Inventors: Michael Mocella, Andrew E. Feiring, Theodore A. Treat, Yakov Brichko, Eugene Lopata, Peter Rose
  • Polymerization of fluoromonomers
    Patent number: 6395848
    Abstract: Aqueous dispersion polymerization of fluoromonomers is improved by using a combination of fluorosurfactants, one of which is a perfluoropolyether carboxylic acid or sulfonic acid or salt of either.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: May 28, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Alan Morgan, Clay Woodward Jones, Theodore Treat, Jeffrey A. Hrivnak
  • Process for synthesizing fluoropolymers
    Patent number: 5310836
    Abstract: The invention provides a process for polymerizing at least one fluoromonomer in the presence of a cyclic perfluorinated amine. Perfluoro-N-methylmorpholine is a preferred cyclic amine.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: May 10, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Theodore A. Treat
  • Hydrofluorocarbon solvents for fluoromonomer polymerization
    Patent number: 5182342
    Abstract: A novel process for the free radical polymerization of fluoromonomers in which selected hydrofluorocarbon solvents are used. The solvents have little effect on atmospheric temperature and ozone concentrations. The polymers produced are useful as thermoplastics and elastomers.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: January 26, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Andrew E. Feiring, Carl G. Krespan, Paul R. Resnick, Bruce E. Smart, Theodore A. Treat, Robert C. Wheland
  • Process for removing toxic perfluoroisobutylene
    Patent number: T983009
    Abstract: a process for converting toxic perfluoroisobutylene in a mixture of fluorine-containing compounds into a relatively nontoxic ether which comprises contacting the mixture with a solution of methanol and a selected hydrogen halide.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: June 5, 1979
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Theodore A. Treat