Patents by Inventor Rasik C. Shah

Rasik C. Shah 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).

  • Resin binders for foundry sand cores and molds
    Patent number: 4848442
    Abstract: An alkoxy-modified phenolic resole resin providing an improved binder for foundry cores and molds. The resin has predominantly ortho-ortho benzylic ether bridges joining the phenolic nuclei in the resin and at least one alkoxymethylene group for every 20 phenolic nuclei.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: July 18, 1989
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar
  • Phenolic resin binders for foundry and refractory uses
    Patent number: 4740535
    Abstract: A process for preparing modified phenolic resole resins providing improved binders for refractories and foundry cores and molds. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of an alkaline catalyst followed by further reaction at a pH below 7 in the presence of a catalyst which promotes formation of ortho-ortho benzylic ether bridges between the phenolic nuclei.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: April 26, 1988
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah
  • Phenolic resin binders for foundry and refractory uses
    Patent number: 4668759
    Abstract: A process for preparing modified phenolic resole resins providing improved binders for refractories and foundry cores and molds. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of an alkaline catalyst followed by further reaction at a pH below 7 in the presence of a catalyst which promotes formation of ortho-ortho benzylic ether bridges between the phenolic nuclei.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: May 26, 1987
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah
  • Refractory binders
    Patent number: 4657950
    Abstract: Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and an alkoxy modified phenolic resole resin having at least one alkoxy methylene group for every 20 phenolic hydroxyl groups.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: April 14, 1987
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar