Patents by Inventor Ramchandra K. Hulyalkar

Ramchandra K. Hulyalkar 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).

  • Patent number: 4417015
    Abstract: Liquid antimony organic sulfur-containing compounds are rendered stable at ambient conditions by incorporating an effective amount of an ethoxylated organo phosphate ester. The stable liquid compositions contribute to the stability of vinyl halide resins.
    Type: Grant
    Filed: February 6, 1981
    Date of Patent: November 22, 1983
    Assignee: Dart Industries Inc.
    Inventors: Ramchandra K. Hulyalkar, Gerald A. Baum, Kanayo Hotchandani
  • Patent number: 4269744
    Abstract: A vinyl halide resin stabilizer composition which essentially contains:(a) a calcium, zinc or mixed calcium/zinc salt of a higher fatty acid;(b) a polyhydroxy alcohol component wherein at least 50% of this component is either di-or tri-pentaerythritol; and(c) a magnesium compound, particularly magnesium hydroxide or magnesium acetateThese compositions synergistically contribute to the heat stability of vinyl halide resin compositions and offer significant heat stabilization economies. Early color as well as long term heat stability performances of the metal salt compounds are improved in the compositions disclosed thereby permitting the reduction in amounts of such compounds needed for stabilization.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: May 26, 1981
    Assignee: Dart Industries Inc.
    Inventors: Ramchandra K. Hulyalkar, Gerald A. Baum
  • Patent number: 4269743
    Abstract: A vinyl halide resin stabilizer composition which essentially contains:(a) a calcium, zinc or mixed calcium/zinc salt of a higher fatty acid; and(b) a polyhydroxy alcohol component wherein at least 50% of this component is either di-or tri-pentaerythritol.These compositions synergistically contribute to the heat stability of vinyl halide resin compositions and offer significant heat stabilization economies. Early color as well as long term heat stability performances of the metal salt compounds are improved in the compositions disclosed thereby permitting the reduction in amounts of such compounds needed for stabilization.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: May 26, 1981
    Assignee: Dart Industries Inc.
    Inventors: Ramchandra K. Hulyalkar, Gerald A. Baum
  • Patent number: 4228058
    Abstract: Flame retardant latex bases having an excellent balance of properties are prepared most efficiently and economically by blending together two separately polymerized latexes of different types, the polymeric content of one of said latexes being formed predominantly from a monomer mixture consisting of from about 70 to about 92% by weight vinylidene chloride and 8 to 30% by weight of certain polar comonomers principally of the lower alkyl acrylate class while the polymeric content of the second latex is formed from a monomer mixture consisting predominantly of styrene and butadiene. This technique of producing the desired flame retardant latex bases by combining two separately prepared but simpler component latexes not only maximizes quality control and manufacturing flexibility but also permits the simultaneous realization of higher conversions and reduced polymerization cycles or residence times so that productivity is also maximized.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: October 14, 1980
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Ramchandra K. Hulyalkar, Rodrigue V. Lauzon
  • Patent number: 3997629
    Abstract: A propylene polymer composition having excellent affinity towards basic dyestuffs is produced by blending a propylene polymer with an alternating copolymer of an alkyl vinyl ether and maleic anhydride, the alkyl group of the alkyl vinyl ether containing at least 8 carbon atoms.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: December 14, 1976
    Assignee: Dart Industries Inc.
    Inventors: Ramchandra K. Hulyalkar, Marvin Michael Fein, Jan Edmond Vandegaer