Patents by Inventor Devasish Chowdhury

Devasish Chowdhury 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: 6833162
    Abstract: A process for generating colored nanolithography patterns of parallel lines or cross pattern lines on a glass or plastic substrate, said process consisting the steps of pressing a polycarbonate or aluminium mold obtained from a compact disk on a glass or plastic surface inked with a permanent marker ink for one or more times to create lithographic patterns of parallel colored lines or cross pattern lines. Also, the present invention provides a method for generating colored nanolithography patterns of parallel lines or cross pattern lines on a glass or plastic substrate having dried ink, said process consisting keeping the plastic or glass substrate having the dried ink in a chamber containg ethanol or toluene for about 10 seconds followed by pressing the polycarbonate or aluminium mold obtained from a compact disk on the glass or plastic surface to generate the pattern.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: December 21, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Arun Chattopadhyay, Anumita Paul, Devasish Chowdhury
  • Publication number: 20040101616
    Abstract: A process for generating colored nanolithography patterns of parallel lines or cross pattern lines on a glass or plastic substrate, said process consisting the steps of pressing a polycarbonate or aluminium mold obtained from a compact disk on a glass or plastic surface inked with a permanent marker ink for one or more times to create lithographic patterns of parallel coloured lines or cross pattern lines. Also, the present invention provides a method for generating colored nanolithography patterns of parallel lines or cross pattern lines on a glass or plastic substrate having dried ink, said process consisting keeping the plastic or glass substrate having the dried ink in a chamber containg ethanol or toluene for about 10 seconds followed by pressing the polycarbonate or aluminium mold obtained from a compact disk on the glass or plastic surface to generate the pattern.
    Type: Application
    Filed: November 26, 2002
    Publication date: May 27, 2004
    Inventors: Arun Chattopadhyay, Anumita Paul, Devasish Chowdhury