Patents by Inventor Vadiraj Subbanna Ekkundi

Vadiraj Subbanna Ekkundi 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).

  • Adsorbents comprising anthraquinone dye-ligends for the separation of biological materials
    Patent number: 8227599
    Abstract: A process for the separation of biological materials, such as dye-ligand affinity chromatography, wherein an adsorbent is used, which comprises a reaction product of certain reactive anthroquinone compounds and a substrate having a group capable of reaction with a reactive group in said reactive anthroquinone compounds to form a covalent bond.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: July 24, 2012
    Assignee: BASF SE
    Inventors: Vadiraj Subbanna Ekkundi, Narayan S. Punekar, Kamalesh Pai Fondekar, Georg Roentgen, Shilpa S. Korde, Ajit B. Shinde, Masana Moorthy
  • Liquid crystal display and colour filter with improved transparency for green light
    Patent number: 7582230
    Abstract: The invention relates to novel liquid crystal displays comprising a broad backlight emission around 530 nm and a green color filter containing a phthalocyanine colorant, most adequately tetrahydroxy- or tetraalkoxy-substituted but lacking solubilizing groups.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: September 1, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Gerardus de Keyzer, Taher Yousaf, Vadiraj Subbanna Ekkundi, Chandrasekhar Dayal Mudaliar
  • Adsorbents Comprising Anthraquinone Dye-Ligends for the Separation of Biological Materials
    Publication number: 20090081757
    Abstract: A process for the separation of biological materials, such as dye-ligand affinity chromatography, wherein an adsorbent is used, which comprises a reaction product of certain reactive anthroquinone compounds and a substrate having a group capable of reaction with a reactive group in said reactive anthroquinone compounds to form a covalent bond.
    Type: Application
    Filed: March 29, 2006
    Publication date: March 26, 2009
    Inventors: Vadiraj Subbanna Ekkundi, Narayan S. Punekar, Kamalesh Pai Fondekar, Georg Roentgen, Shilpa S. Korde, Ajit B. Shinde, Masana Moorthy
  • Process for the production of halogeno-o-hydroxydiphenyl compounds
    Patent number: 6239317
    Abstract: There is described a four step process for the production of halogeno-o-hydroxydiphenyl compounds having the formula in which X is —O—or —CH2—; m is 1 to 3; and n is 1 or 2; wherein in the first step, a diphenyl compound is chlorinated; in a second step the chlorinated compound is acylated in a Friedel-Crafts reaction and optionally again chlorinated after the acylation; in a third step the acyl compound is oxidised; and in a fourth step the oxidized compound is hydrolyzed. The compounds of formula (1) are useful for the protection of organic materials against microorganisms.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: May 29, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Surendra Umesh Kulkarni, Vadiraj Subbanna Ekkundi, Pradeep Jeevaji Nadkarni, Chandrasekhar Dayal Mudaliar, Kishore Ramachandra Nivalkar