Patents by Inventor Puthenveetil John

Puthenveetil John 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).

  • Optical food oil quality sensor
    Patent number: 6717667
    Abstract: An instrument for measuring reliably and instantaneously the chemical quality of cooking oil, and for distinguishing between color changes due to chemical changes and color changes due to the presence of minute size food particles in various oils.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: April 6, 2004
    Assignee: Northern Photonics
    Inventors: Varghese Abraham, Sajeev John, Puthenveetil John
  • Optical food oil quality sensor
    Publication number: 20030147073
    Abstract: An instrument for measuring reliably and instantaneously the chemical quality of cooking oil, and for distinguishing between colour changes due to chemical changes and colour changes due to the presence of minute size food particles in various oils.
    Type: Application
    Filed: January 13, 2003
    Publication date: August 7, 2003
    Inventors: Varghese Abraham, Sajeev John, Puthenveetil John