Patents by Inventor Dennis Patrick Stack

Dennis Patrick Stack 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).

  • Polymer process
    Patent number: 6991763
    Abstract: Disclosed is a process for controlling the level of in-process monomer in an emulsion polymerization reaction. Also disclosed is a method of controlling particle size by controlling the level of in-process monomer.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: January 31, 2006
    Assignee: Rohm and Haas Company
    Inventors: Michael Raymond Connelly, Dennis Patrick Stack, Richard Shu-Hua Wu, Ronald Ray Zimmer
  • Process for preparing polymers
    Patent number: 6515082
    Abstract: This invention relates to a process for preparing polymers which contain as polymerized units hydrophobic monomers wherein a stable emulsion is formed and the formation of suspension particles is minimized. The process includes making a concentrated monomer emulsion, diluting the concentrated monomer emulsion with water, feeding the diluted monomer emulsion to a reactor, and polymerizing the monomer.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: February 4, 2003
    Assignee: Rohm And Haas Company
    Inventors: Jeffrey Lewis Brown, Dennis Patrick Stack, Richard Shu-Hua Wu
  • Polymer process
    Publication number: 20020001547
    Abstract: Disclosed is a process for controlling the level of in-process monomer in an emulsion polymerization reaction. Also disclosed is a method of controlling particle size by controlling the level of in-process monomer.
    Type: Application
    Filed: April 4, 2001
    Publication date: January 3, 2002
    Inventors: Michael Raymond Connelly, Dennis Patrick Stack, Richard Shu-Hua Wu, Ronald Ray Zimmer