Patents by Inventor Swagata Nanda

Swagata Nanda 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).

  • Zirconium compound, catalyst and its use for polyurethane manufacture
    Patent number: 8586696
    Abstract: The invention comprises a catalyst compound of formula Zr(L)(A1)(A2)(A3) where L represents a ketoamide ligand, A1, A2 & A3 may be the same or different and each represent a ligand derived from a compound selected from the group consisting of:—an alcohol, a polyol, an alkyl acetoacetate, a diketone, a ketoamide, a carboxylic acid or ester thereof, an alkanolamine, a phosphoric acid ester and a sulphonic acid or ester thereof. The compound may be made by the reaction of a zirconium alkoxide or haloalkoxide with a ketoamide. The compound is useful as a catalyst for the reaction of a polyisocyanate with a hydroxyl-containing compound, e.g. for the manufacture of polyurethanes or composite cellulosic materials such as fibre-boards.
    Type: Grant
    Filed: July 4, 2006
    Date of Patent: November 19, 2013
    Assignee: Dorf Ketal Chemicals (India) PVT. Ltd
    Inventors: Arran Alexander Dickon Tulloch, Swagata Nanda, Bruno Frederic Stengel
  • Novel Zirconium Compound, Catalyst and Its Use for Polyurethane Manufacture
    Publication number: 20080312402
    Abstract: The invention comprises a catalyst compound of formula Zr(L)(A1)(A2)(A3) where L represents a ketoamide ligand, A1, A2 & A3 may be the same or different and each represent a ligand derived from a compound selected from the group consisting of:—an alcohol, a polyol, an alkyl acetoacetate, a diketone, a ketoamide, a carboxylic acid or ester thereof, an alkanolamine, a phosphoric acid ester and a sulphonic acid or ester thereof. The compound may be made by the reaction of a zirconium alkoxide or haloalkoxide with a ketoamide. The compound is useful as a catalyst for the reaction of a polyisocyanate with a hydroxyl-containing compound, e.g. for the manufacture of polyurethanes or composite cellulosic materials such as fibre-boards.
    Type: Application
    Filed: July 4, 2006
    Publication date: December 18, 2008
    Applicant: Johnson Matthey PLC
    Inventors: Arran Alexander Dickon Tulloch, Swagata Nanda, Bruno Frederic Stengel