Patents by Inventor Pravin Kukkala

Pravin Kukkala 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: 11479631
    Abstract: The invention relates to a composition that contains a binary mixture of bisphenol F and propoxylated bisphenol F. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good handling from a technical point of view and good miscibility with the isocyanate component and render the end product flameproof. For this purpose, the invention devises a composition, which contains a binary mixture of ethoxylated bisphenol F and propoxylated bisphenol F in a weight ratio of 20:80 to 80:20.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: October 25, 2022
    Inventors: Stephan Schröter, Pravin Kukkala, Ganapathy Viswanathan, Anthony Maiorana, Athina Kerkaidou
  • Publication number: 20210230342
    Abstract: The invention relates to a composition that contains a binary mixture of bisphenol F and propoxylated bisphenol F. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good handling from a technical point of view and good miscibility with the isocyanate component and render the end product flameproof. For this purpose, the invention devises a composition, which contains a binary mixture of ethoxylated bisphenol F and propoxylated bisphenol F in a weight ratio of 20:80 to 80:20.
    Type: Application
    Filed: May 28, 2019
    Publication date: July 29, 2021
    Inventors: Stephan SCHRÖTER, Pravin KUKKALA, Ganapathy VISWANATHAN, Anthony MAIORANA, Athina KERKAIDOU
  • Publication number: 20210214295
    Abstract: The invention relates to a process for preparing an alkoxylated product. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good miscibility with the isocyanate component and other components, have a good storage stability and render the end product flameproof. For this purpose, the invention devises a process for preparing an alkoxylated product by reacting bisphenol F with propylene carbonate and/or propylene oxide as propoxylation agent and ethylene carbonate and/or ethylene oxide as ethoxylation agent, the propoxylation agent and the ethoxylation agent being used in a molar ration of 70:30 to 45:55.
    Type: Application
    Filed: May 28, 2019
    Publication date: July 15, 2021
    Inventors: Stephan SCHRÖTER, Pravin KUKKALA, Ganapathy VISWANATHAN, Sarah BAY, Athina KERKAlDOU
  • Patent number: 10640475
    Abstract: The embodiments described herein generally relate to methods and chemical compositions of triazine-arylhydroxy-aldehyde condensates. In one embodiment, a triazine-arylhydroxy-aldehyde condensate is reacted with at alkoxylation agent to form alkoxylated triazine-arylhydroxy-aldehyde condensates.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: May 5, 2020
    Assignee: HEXION INC.
    Inventors: Ganapathy S. Viswanathan, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Patent number: 10604614
    Abstract: The embodiments described herein generally relate to methods and chemical compositions of triazine-arylhydroxy-aldehyde condensates. In one embodiment, a triazine-arylhydroxy-aldehyde condensate is reacted with at alkoxylation agent to form alkoxylated triazine-arylhydroxy-aldehyde condensates.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 31, 2020
    Assignee: Hexion Inc.
    Inventors: Ganapathy S. Viswanathan, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Patent number: 10435503
    Abstract: A process comprising, consisting of, or consisting essentially of: foaming a reaction mixture containing at least one polyisocyanate and an isocyanate-reactive compound comprising at least one alkoxylated triazine-arylhydroxy-aldehyde condensate composition wherein the alkoxylated triazine-arylhydroxy-aldehyde condensate composition is a reaction product of a triazine-arylhydroxy-aldehyde condensate and at least one alkylene carbonate, is disclosed.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: October 8, 2019
    Assignee: HEXION INC.
    Inventors: Ganapathy Viswanathan, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Publication number: 20190092897
    Abstract: A process comprising, consisting of, or consisting essentially of: foaming a reaction mixture containing at least one polyisocyanate and an isocyanate-reactive compound comprising at least one alkoxylated triazine-arylhydroxy-aldehyde condensate composition wherein the alkoxylated triazine-arylhydroxy-aldehyde condensate composition is a reaction product of a triazine-arylhydroxy-aldehyde condensate and at least one alkylene carbonate, is disclosed.
    Type: Application
    Filed: September 22, 2017
    Publication date: March 28, 2019
    Inventors: Ganapathy S. VISWANATHAN, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Publication number: 20190092736
    Abstract: The embodiments described herein generally relate to methods and chemical compositions of triazine-arylhydroxy-aldehyde condensates. In one embodiment, a triazine-arylhydroxy-aldehyde condensate is reacted with at alkoxylation agent to form alkoxylated triazine-arylhydroxy-aldehyde condensates.
    Type: Application
    Filed: July 24, 2018
    Publication date: March 28, 2019
    Inventors: Ganapathy S. VISWANATHAN, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Publication number: 20190092894
    Abstract: The embodiments described herein generally relate to methods and chemical compositions of triazine-arylhydroxy-aldehyde condensates. In one embodiment, a triazine-arylhydroxy-aldehyde condensate is reacted with at alkoxylation agent to form alkoxylated triazine-arylhydroxy-aldehyde condensates.
    Type: Application
    Filed: July 24, 2018
    Publication date: March 28, 2019
    Inventors: Ganapathy S. VISWANATHAN, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Patent number: 10118905
    Abstract: Triazine-arylhydroxy-aldehyde condensates are reacted with at least one alkylene carbonate to form alkoxylated triazine-arylhydroxy-aldehyde condensates.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: November 6, 2018
    Assignee: Hexion Inc.
    Inventors: Ganapathy Viswanathan, Anthony Maiorana, Stephan Schröter, Pravin Kukkala
  • Patent number: 6001916
    Abstract: A process for the production of ethylene vinyl acetate based polymer emulsions having solids levels greater than about 65% by weight comprising the steps of:i) providing a polymer seed selected from the group consisting of vinyl acetate, ethylene vinyl acetate, acrylic, vinyl-acrylic and styrene (meth) acrylic having a particle size of 0.15 to 2.5 microns;ii) polymerizing vinyl acetate and ethylene monomers in the presence of 5 to 15% by weight of the final emulsion of said polymer seed;said polymerization of step (ii) being carried out in the presence of a surfactant system comprising polyvinyl alcohol and a nonionic emulsifier.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: December 14, 1999
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: James L. Walker, Pravin Kukkala
  • Patent number: 5939505
    Abstract: In a process for the polymerization of aqueous ethylene vinyl acetate emulsions wherein the polymerization is carried out in the presence of a stabilizing system comprising polyvinyl alcohol and a surfactant, the improvement which comprises using a stabilizing system consisting essentially of 2 to 8% polyvinyl alcohol and 0.25 to 4% of at least one surface-active compound comprising the addition products of 50 to 70 moles of ethylene oxide adducted to straight-chained or branch-chained alkanols or alkylphenols containing 6 to 22 carbon atoms in the alkyl group and having an HLB value equal to or greater than 18.0, the amounts being based on total vinyl acetate.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: August 17, 1999
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventor: Pravin Kukkala
  • Patent number: 5916968
    Abstract: A graft copolymer for use as an adhesive for drug delivery patches or dressings that is resistant to dissolution in the presence of skin penetration enhancers comprises copolymerized acrylic and, optionally, vinyl monomers, to form a backbone polymer, to which are grafted polymeric moieties that do not absorb greater than 3% by weight of a skin-penetration enhancer under thermodynamic equilibrium at 25.degree. C. if independently introduced into an excess of the enhancer. Preferably, the grafted polymers are selected from the classes of polybutylene, polysaccharide, poly(ethyleneoxide/propyleneoxide), and polyamide polymers, and specific grafted polymers will depend on the specific enhancers used in a particular drug delivery system.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: June 29, 1999
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Deepak Hariharan, Roman Bradel, Rama Chandran, Pravin Kukkala
  • Patent number: 5858549
    Abstract: (Hydroxyalkyl)urea crosslinking agents and compositions which utilize such crosslinking agents are disclosed. The crosslinking agents contain a single urea group, at least two hydroxyl groups, and have at least two carbon atoms disposed between the urea group and each of the hydroxyl groups. The compositions contain a poly-functional molecule which contains at least two functional groups selected from the group consisting of carboxyl, anhydride and amine.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: January 12, 1999
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Andrew J. Kielbania, Jr., Pravin Kukkala, Sharon Lee, John C. Leighton