Patents by Inventor Sivaramapanicker Sreejith

Sivaramapanicker Sreejith 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).

  • Pyrrole end-capped bipyridine assay powder for selective detection of zinc ions and a process for the preparation thereof
    Patent number: 8344150
    Abstract: The present invention provides pyrrole end-capped bipyridine derivative having a general formula (1) useful for the detection of zinc ions in solution. The present invention also provides a process for the preparation of pyrrole end-capped bipyridine derivative having a general formula (1). The present invention further provides a dipstick device by coating the assay powder of formula (1) in alumina over a thermoplastic or a glass solid support. The detection event can be monitored by noting the color change and the intense fluorescence change on the surface of the dipstick. For zinc ions, in addition to the color change an intense fluorescence change from greenish-yellow to red is observed. Detection event by means of fluorescence change is selective for Zn2+ ions when compared with all other biologically important metal ions like Na+, K+, Ca2+; Mg2+, Cu2+. The present dipstick is reusable, and can conduct the analysis of different samples using same stick.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: January 1, 2013
    Assignee: Council of Scientific & Industrial Research
    Inventors: Ayyappanpillai Ajayaghosh, Sivaramapanicker Sreejith
  • PYRROLE END-CAPPED BIPYRIDINE ASSAY POWDER FOR SELECTIVE DETECTION OF ZINC IONS AND A PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20100284858
    Abstract: The present invention provides pyrrole end-capped bipyridine derivative having a general formula (1) useful for the detection of zinc ions in solution. The present invention also provides a process for the preparation of pyrrole end-capped bipyridine derivative having a general formula (1). The present invention further provides a dipstick device by coating the assay powder of formula (1) in alumina over a thermoplastic or a glass solid support. The detection event can be monitored by noting the color change and the intense fluorescence change on the surface of the dipstick. For zinc ions, in addition to the color change an intense fluorescence change from greenish-yellow to red is observed. Detection event by means of fluorescence change is selective for Zn2+ ions when compared with all other biologically important metal ions like Na+, K+, Ca2+; Mg2+, Cu2+. The present dipstick is reusable, and can conduct the analysis of different samples using same stick.
    Type: Application
    Filed: June 13, 2008
    Publication date: November 11, 2010
    Applicant: Council of Scientific & Industrial Research
    Inventors: Ayyappanpillai Ajayaghosh, Sivaramapanicker Sreejith