Patents by Inventor Dilip G. Kalthod

Dilip G. 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).

  • Control of dissolved gases in liquids
    Patent number: 5565149
    Abstract: The present invention provides a gas/liquid contactor module having hollow fiber membranes and a process for controlling dissolved gases in liquids such as water, beer and the like, by passing the liquid through the shell side of the contactor module to allow addition or removal of dissolved gases by the diffusion of the gases through the membranes into or from the hollow fiber bores. The process permits control of the quantity of such dissolved gases as carbon dioxide and nitrogen.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: October 15, 1996
    Assignee: Permea, Inc.
    Inventors: John K. R. Page, Dilip G. Kalthod
  • Hollow fiber membrane dryer with internal sweep
    Patent number: 5525143
    Abstract: The present invention provides a method and apparatus for the dehydration of gases utilizing hollow fiber membranes. The invention provides an internal sweep of the permeate side of the membranes utilizing an aperture in the tubesheet at the product end of the module thereby sweeping the permeate side of the membrane with product gas.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: June 11, 1996
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William H. Morgan, Lawrence K. Bleikamp, Dilip G. Kalthod
  • Production of enriched oxygen gas stream utilizing hollow fiber membranes
    Patent number: 5500036
    Abstract: The present invention relates to a process and an apparatus for providing an enriched oxygen gas stream. A countercurrent sweep gas stream is provided to the permeate side of the hollow fiber membranes internally of a gas separation module.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: March 19, 1996
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Dilip G. Kalthod
  • Multiple stage countercurrent hollow fiber membrane module
    Patent number: 5288308
    Abstract: A hollow fiber separation module is provided having a single, elongated pressurizable shell and containing multiple separation stages by multiple sections of hollow fiber bundles contained within the shell, with the ends of each bundle section potted within a single tubesheet at each end of the elongated shell. The fibers within each section are aligned so that the permeate within the fiber bores passes along paths traveling generally from one tubesheet to the other and one or more impermeable barriers are provided within the shell to isolate each section and control the passage of feed gas along the shell side of each fiber bundle section in a flow path countercurrent to the passage of permeate in the bores of the fibers.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: February 22, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Pushpinder S. Puri, Dilip G. Kalthod
  • Multiple stage countercurrent hollow fiber membrane module
    Patent number: 5176725
    Abstract: A hollow fiber separation module is provided having a single, elongated pressurizable shell and containing multiple separation stages by multiple sections of hollow fiber bundles contained within the shell, with the ends of each bundle section potted within a single tubesheet at each end of the elongated shell. The fibers within each section are aligned so that the permeate within the fiber bores passes along paths traveling generally from one tubesheet to the other and one or more impermeable barriers are provided within the shell to isolate each section and control the passage of feed gas along the shell side of each fiber bundle section in a flow path countercurrent to the passage of permeate in the bores of the fibers.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: January 5, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Pushpinder S. Puri, Dilip G. Kalthod