Patents by Inventor Ramanuj Narayan

Ramanuj Narayan 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).

  • Anti-corrosive hybrid sol-gel film on metallic substrates and method of producing the same
    Patent number: 8900670
    Abstract: This invention relates to a method of preparing anti-corrosive hybrid sol-gel film coating on zinc or zinc alloy coated metallic substrates comprising the steps of preparing a mixture of sol-gel from hydrolisable silicon alkoxides, sodium venadate solution combined with colloidal silica in a beaker and vigorously stirred; adding within 20 seconds of two separated phase formation between silica precursors and colloidal silica acetic acid or dilute nitric acid as a catalizer to initiate hydrolysis reaction of silicon alkoxides and condensation reaction in the sol gel composition, continuously stirring the mixture for about 24 hours to form a single phase solution, applying the solution on cleaned zinc or zinc alloy coated metal substrates to form a transparent sol-gel coating film and drying the coated substrates at 50° to 200° C. for 10 to 60 minutes.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: December 2, 2014
    Assignee: Tata Steel Limited
    Inventors: Arun Kumar Singh, Tapan K. Rout, Ramanuj Narayan, Anil K. Verma, Nikhiles Bandyopadhyay, Nitu Rani
  • ANTI-CORROSIVE HYBRID SOL-GEL FILM ON METALLIC SUBSTRATES AND METHOD OF PRODUCING THE SAME
    Publication number: 20110091654
    Abstract: This invention relates to a method of preparing anti-corrosive hybrid sol-gel film coating on zinc or zinc alloy coated metallic substrates comprising the steps of preparing a mixture of sol-gel from hydrolisable silicon alkoxides, sodium venadate solution combined with colloidal silica in a beaker and vigorously stirred; adding within 20 seconds of two separated phase formation between silica precursors and colloidal silica acetic acid or dilute nitric acid as a catalizer to initiate hydrolysis reaction of silicon alkoxides and condensation reaction in the sol gel composition, continuously stirring the mixture for about 24 hours to form a single phase solution, applying the solution on cleaned zinc or zinc alloy coated metal substrates to form a transparent sol-gel coating film and drying the coated substrates at 50° to 200° C. for 10 to 60 minutes.
    Type: Application
    Filed: May 23, 2008
    Publication date: April 21, 2011
    Applicant: Tata Steel Limited
    Inventors: A. K. Singh, Tapan Kumar Rout, Ramanuj Narayan, Anil Kumar Verma, N. Bandyopadhyay, Nitu Rani