Patents by Inventor Salil K. Das

Salil 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).

  • Patent number: 4108324
    Abstract: A container formed of synthetic resinous material having a bottom structure the outer surface of which comprises a central concavity and a convex heel, the heel surrounding the concavity and merging therewith and with the container sidewall. A plurality of hollow convex ribs, distributed in a symmetrical array, interrupt the outer surface of the concavity and merge smoothly therewith, each rib extending longitudinally in the direction of the heel and downwardly from an inner portion of the concavity. The wall of the bottom structure generally decreases in thickness progressively from the innermost point of the concavity to the sidewall.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: August 22, 1978
    Assignee: The Continental Group, Inc.
    Inventors: Suppayan M. Krishnakumar, Siegfried S. Roy, John F. E. Pocock, Salil K. Das, Gautam K. Mahajan
  • Patent number: 3935955
    Abstract: An improved bottom structure for plastic bottles of the type suitable for containing carbonated beverages. The outer surface of the bottom structure is formed with a central concave dome portion and a number of radial foot portions extending axially outwardly. The radial profile of each foot portion is a curve which merges with the dome portion and with the side wall of the container and which comprises a plurality of tangential arcs in series. Also disclosed is an improved mold for forming such bottom structures.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: February 3, 1976
    Assignee: Continental Can Company, Inc.
    Inventor: Salil K. Das