Patents by Inventor Navnitrai Nagirji Naik

Navnitrai Nagirji Naik 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).

  • Process for dyeing and printing textile materials of synthetic organic fibers
    Patent number: 3964862
    Abstract: A process for dyeing and printing textile materials made of or containing fully synthetic hydrophobic linear polymers which are free from amino groups, wherein the material is padded with a dispersion dyestuff containing at least one carboxyl group, the padded textile material is dried and printed with an alkaline printing paste, the fabric is thermo-fixed and the salt of the dyestuff containing a carboxyl group is subsequently washed from the printed areas.
    Type: Grant
    Filed: September 21, 1973
    Date of Patent: June 22, 1976
    Assignee: Ciba-Geigy AG
    Inventors: Purushottam Janardan Kangle, Hermann Werdenberg, Klaus Artz, Visvanathan Ramanathan, Navnitrai Nagirji Naik, Branimir Milicevic