Patents by Inventor Navnitrai Nagarji Naik

Navnitrai Nagarji 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).

  • Monoazo compounds
    Patent number: 3971740
    Abstract: Azo dyestuffs containing at least one group of formula --X--CO--NR--SO.sub.2 aryl, wherein R is hydrogen alkyl or cycloalkyl and X is an oxygen or sulphur atom or a group of formula --NR.sub.1 --, wherein R.sub.1 is hydrogen alkyl or cycloalkyl. The dyestuffs dye polyester fibers in fast shades.
    Type: Grant
    Filed: March 5, 1974
    Date of Patent: July 27, 1976
    Assignee: Ciba-Geigy AG
    Inventors: Nalin Binduprasad Desai, Ponnusami Jayaraman, Visvanathan Ramanathan, Klaus Artz, Navnitrai Nagarji Naik, Walter Jenny