Patents by Inventor Dilip Gurudath Kalthod

Dilip Gurudath Kalthod 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).

  • Composite membranes
    Patent number: 6688477
    Abstract: The present invention provides a composite membrane comprising a porous support layer and a selective layer comprising a vinylacetate polymer. The invention also provides a process for preparing a vinylacetate polymer selective layer on a porous support by depositing a colloidal dispersion having colloid particles of the vinylacetate polymer on the porous support followed by annealing the deposited colloids to form a selective layer. The membranes are useful for separation of gas or liquid or vapor mixtures.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: February 10, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Dilip Gurudath Kalthod
  • Composite membranes
    Publication number: 20030024881
    Abstract: The present invention provides a composite membrane comprising a porous support layer and a selective layer comprising a vinylacetate polymer. The invention also provides a process for preparing a vinylacetate polymer selective layer on a porous support by depositing a colloidal dispersion having colloid particles of the vinylacetate polymer on the porous support followed by annealing the deposited colloids to form a selective layer. The membranes are useful for separation of gas or liquid or vapor mixtures.
    Type: Application
    Filed: May 3, 2001
    Publication date: February 6, 2003
    Inventor: Dilip Gurudath Kalthod
  • Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voids
    Patent number: 5779897
    Abstract: The present invention provides a fluid separation module and a process for utilizing the module containing a bundle of hollow fiber membranes and randomly dispersed within the bundle of fibers are filaments having an outer diameter from about 60 to about 3000 microns. The hollow fibers have an outer diameter from about 100 to about 1000 microns. The filaments are present in number from 0.5 to 5 filaments per fiber. Preferably, the filaments are placed among the fibers during manufacturing of the fibers and/or bundle. The presence of the filaments enhances the performance of the fluid separation module.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: July 14, 1998
    Assignee: Permea, Inc.
    Inventors: Dilip Gurudath Kalthod, Donald Joseph Stookey