Patents by Inventor Agbai Agwu Nnanna

Agbai Agwu Nnanna 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).

  • Oxazine-based sensor for contaminant detection, fabrication method therefor, and uses thereof
    Patent number: 8735165
    Abstract: A sensor, a method for its fabrication, and a method for its use to detect contaminants, for example, ammonia, in stagnant and dynamic fluid media, especially liquid media. The sensor is an opto-chemical sensor that includes a polymer optical fiber, a sensing layer comprising oxazine 170 perchlorate on the polymer optical fiber, and a membrane layer on the sensing layer. The membrane layer is gas permeable and not permeable to the fluid in the fluid system, and moisture is entrapped by and between the sensing and membrane layers.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: May 27, 2014
    Assignee: Purdue Research Foundation
    Inventors: Agbai Agwu Nnanna, Ahmed Hasnain Jalal
  • OXAZINE-BASED SENSOR FOR CONTAMINANT DETECTION, FABRICATION METHOD THEREFOR, AND USES THEREOF
    Publication number: 20120288953
    Abstract: A sensor, a method for its fabrication, and a method for its use to detect contaminants, for example, ammonia, in stagnant and dynamic fluid media, especially liquid media. The sensor is an opto-chemical sensor that includes a polymer optical fiber, a sensing layer comprising oxazine 170 perchlorate on the polymer optical fiber, and a membrane layer on the sensing layer. The membrane layer is gas permeable and not permeable to the fluid in the fluid system, and moisture is entrapped by and between the sensing and membrane layers.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 15, 2012
    Applicant: Purdue Research Foundation
    Inventors: Agbai Agwu Nnanna, Ahmed Hasnain Jalal