Patents by Inventor Joseph V. Kurian

Joseph V. Kurian 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).

  • Esterification process
    Publication number: 20010016642
    Abstract: A process that can be used in an esterification and polycondensation processes to produce a polyester such as, for example, poly(trimethylene terephthalate) is disclosed. The process comprises contacting an acid with 1,3-propanediol in the presence of a catalyst comprising tin and titanium. A copolymer that contains up to 20 mole percent of another acid and/or a second alcohol is also disclosed. Further disclosed are a composition of, or comprising, a bis(3-hydroxypropyl) terephthalate prepolymer or a composition of, or comprising, a poly(trimethylene terephthalate) polymer. The bis(3-hydroxypropyl) terephthalate prepolymer and poly(trimethylene terephthalate) can each contain 10 to 100 ppm tin and 10 to 200 ppm titanium relative to the terephthalic acid content.
    Type: Application
    Filed: February 27, 2001
    Publication date: August 23, 2001
    Inventors: Joseph V. Kurian, Yuanfeng Liang, Donald E. Putzig
  • Process of making a polyester or polyol
    Publication number: 20010011647
    Abstract: This invention relates to an improved process for the treatment of aqueous waste stream containing aldehydes and ketones, in particular, alpha, beta-ethylenically unsaturated aldehydes and ketones, which can be rendered non-toxic to biological treatment systems by contacting the waste stream with organic polyamines and/or inorganic ammonium compounds at essentially ambient conditions.
    Type: Application
    Filed: March 21, 2001
    Publication date: August 9, 2001
    Inventors: Joseph V. Kurian, Yuan Feng Liang
  • Esterification process
    Patent number: 6255442
    Abstract: A process that can be used in an esterification and polycondensation processes to produce a polyester such as, for example, poly(trimethylene terephthalate) is disclosed. The process comprises contacting an acid with 1,3-propanediol in the presence of a catalyst comprising tin and titanium. A copolymer that contains up to 20 mole percent of another acid and/or a second alcohol is also disclosed. Further disclosed are a composition of, or comprising, a bis(3-hydroxypropyl) terephthalate prepolymer or a composition of, or comprising, a poly(trimethylene terephthalate) polymer. The bis(3-hydroxypropyl) terephthalate prepolymer and poly(trimethylene terephthalate) can each contain 10 to 100 ppm tin and 10 to 200 ppm titanium relative to the terephthalic acid content.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph V Kurian, Yuanfeng Liang, Donald Edward Putzig
  • Process of making a shaped article from nylon polymer
    Patent number: 5925300
    Abstract: A process for making shaped articles from nylon polymer by melting the polymer and forming the molten polymer into articles is improved by adding to the polymer at least about 5 ppm of an additive compound selected from the group consisting of magnesium, calcium and zinc salts of aliphatic dicarboxylic acids having 2 to 14 carbon atoms.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: July 20, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph V. Kurian, Ralph Walter Nugent
  • Nylon containing nucleation additives
    Patent number: 5654355
    Abstract: A process for making shaped articles from nylon polymer by melting the polymer and forming the molten polymer into articles is improved by adding to the polymer at least about 5 ppm of an additive compound selected from the group consisting of magnesium, calcium and zinc salts of aliphatic dicarboxylic acids having 2 to 14 carbon atoms.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: August 5, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph V. Kurian, Ralph Walter Nugent
  • Surface-coated particulate additives for polymers
    Patent number: 5643592
    Abstract: Finely-divided particulate additives for polymers with a surface coating comprised of a compound selected from the group consisting of esters of difunctional C.sub.6 -C.sub.40 aliphatic and aromatic carboxylic acids and triesters of phosphoric acid.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: July 1, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Howard Wayne Jacobson, Joseph V. Kurian, Scott Thomas Sackinger, Chandrakant Shantilal Shah