Patents by Inventor Anup K. Das

Anup K. Das 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).

  • Manufacture of alkyl silicates
    Patent number: 4211717
    Abstract: Ethyl or other lower alkyl silicate is prepared by the direct reaction of alcohol and silicon thereby avoiding the generation of hydrogen chloride as a by-product. The reaction is carried out at elevated temperature in a catalytic solution of high thermal capacity.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: July 8, 1980
    Assignee: Zirconal Processes Limited
    Inventors: Harold G. Emblem, Anup K. Das, Kenneth Jones
  • Binding of refractory materials
    Patent number: 4166753
    Abstract: The invention provides a method of producing a usefully gellable cohydrolysate from a normally gellable substance and a substance not normally gellable. The latter substance has an alkoxy group implanted on it and preferably is a hydrous oxide which offers appropriate bridge groups for this implant.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: September 4, 1979
    Assignee: Zirconal Processes Limited
    Inventors: Harold G. Emblem, Anup K. Das