Patents by Inventor Santanu Moitra

Santanu Moitra 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).

  • Non-plastic hydraulic cement mixes and process for improving such mixes
    Patent number: 4224076
    Abstract: A method is provided for improving the strength and other properties of non-plastic dry hydraulic cement mixes, such as the dry concrete mixes used for making concrete masonry units. The method comprises incorporating a synergistic combination of two additives into the cement mix. The first additive is a salified methyl or ethyl substituted benzene or naphthalene sulfonate, and is preferably added in an amount of between about 0.01 and 1%, by weight based upon the weight of the cement. The second additive is a tertiary aliphatic amine oxide, and is preferably added in an amount of between 0.001 and 0.1%.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: September 23, 1980
    Assignee: Martin Marietta Corporation
    Inventors: Santanu Moitra, Philip A. Rosskopf