Patents by Inventor Dhafir Yusuf Waddan

Dhafir Yusuf Waddan 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 the manufacture of dicyanobutene from butadiene, hydrogen cyanide and oxygen
    Patent number: 4096171
    Abstract: Butadiene is converted directly to dicyanobutene by reacting with hydrogen cyanide and oxygen or an oxygen-containing gas in the presence of a catalyst comprising copper ions, chloride and/or bromide ions, and iodide ions, and of a solvent for the catalyst.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: June 20, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Robert John Benzie, Dhafir Yusuf Waddan