Patents by Inventor Surojit CHATTOPADHYAY

Surojit CHATTOPADHYAY 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).

  • METHOD FOR MANUFACTURING AND DETECTING ANTI-COUNTERFEITING MARK AND ANTI-COUNTERFEITING IMPLEMENT USING THE SAME
    Publication number: 20160303880
    Abstract: A method of manufacturing and detecting an anti-counterfeiting mark includes steps as follows. For manufacturing an anti-counterfeiting mark, a first ink, which has a contrast enhancer and a lecithin solution with a first concentration, is provided. Then, the first ink is used for drawing an anti-counterfeiting mark on a target object. For detecting the anti-counterfeiting mark, a second ink, which has a chloroauric acid solution having a second concentration, is provided. Then, the second ink is applied onto the target object to form a plurality of gold nanoparticles on the surface of the anti-counterfeiting mark. Further, a tool implementing the above method is also included.
    Type: Application
    Filed: June 17, 2015
    Publication date: October 20, 2016
    Inventors: Surojit CHATTOPADHYAY, Chia-Min WANG
  • Method for manufacturing and using a test paper and chemical composition thereof
    Patent number: 9329177
    Abstract: A method for manufacturing a test paper is disclosed in the present invention, and at least comprises the following steps. First, a chemical precursor comprising at least a reducing agent is coated onto a substrate. The substrate is then dipped into a metal salt solution comprising a plurality of metal ions for a predetermined time to reduce the metal ions to form metal particles on the substrate. Finally, the substrate is taken out and dried to complete a manufacture of at least a test paper. In the meantime a method for using the test paper, and a chemical composition used in the abovementioned for manufacturing the test paper are also disclosed in the present invention.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: May 3, 2016
    Assignee: National Yang Ming University
    Inventors: Surojit Chattopadhyay, Wei-Ju Liao
  • Method for Manufacturing and Using a Test Paper and Chemical Composition Thereof
    Publication number: 20140356856
    Abstract: A method for manufacturing a test paper is disclosed in the present invention, and at least comprises the following steps. First, a chemical precursor comprising at least a reducing agent is coated onto a substrate. The substrate is then dipped into a metal salt solution comprising a plurality of metal ions for a predetermined time to reduce the metal ions to form metal particles on the substrate. Finally, the substrate is taken out and dried to complete a manufacture of at least a test paper. In the meantime a method for using the test paper, and a chemical composition used in the abovementioned for manufacturing the test paper are also disclosed in the present invention.
    Type: Application
    Filed: July 16, 2013
    Publication date: December 4, 2014
    Inventors: Surojit CHATTOPADHYAY, Wei-Ju LIAO