Patents by Inventor Naser M. Chowdhury

Naser M. Chowdhury 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).

  • High purity bulk chemical delivery system
    Patent number: 5539998
    Abstract: An apparatus and method are described for delivering hygroscopic, corrosive chemicals such as hydrogen chloride from a source such as a tube trailer to a use point such as a semiconductor fabrication tool minimizing infiltration of moisture, and entrainment of particulates, while still reducing moisture contents below 100 parts per billion and achieving appropriate pressure drops without two phase flow.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: July 30, 1996
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Lewis J. Mostowy, Naser M. Chowdhury
  • High purity bulk chemical delivery system
    Patent number: 5359787
    Abstract: An apparatus and method are described for delivering hygroscopic, corrosive chemicals such as hydrogen chloride from a source such as a tube trailer to a use point such as a semiconductor fabrication tool minimizing infiltration of moisture, and entrainment of particulates, while still reducing moisture contents below 100 parts per billion and achieving appropriate pressure drops without two phase flow.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: November 1, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Lewis J. Mostowy, Jr., Naser M. Chowdhury