Patents by Inventor David W. Scheimann

David W. Scheimann 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).

  • Method and apparatus for dispersing or dissolving particles of a pelletized material in a liquid
    Patent number: 5374119
    Abstract: A method and an apparatus for dispersing or dissolving a pelletized material in a liquid, in which a pelletized material is placed on a platform in a container having a lower chamber portion, and a stream of liquid is introduced into that lower chamber to produce a vortex of the liquid which washes across the pelletized material, thereby causing it to become dispersed or dissolved into the liquid. In installations where the flow rate of the liquid is below a certain level, a supply of compressed air is injected into the liquid of the lower chamber to prevent mudding of the material.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: December 20, 1994
    Assignee: Nalco Chemical Company
    Inventor: David W. Scheimann
  • Method and apparatus for dispersing or dissolving particles of a pelletized material in a liquid
    Patent number: 5253937
    Abstract: A method and an apparatus for dispersing or dissolving a pelletized material in a liquid, in which a pelletized material is placed on a platform in a container having a lower chamber portion, and a stream of liquid is introduced into that lower chamber to produce a vortex of the liquid which washes across the pelletized material, thereby causing it to become dispersed or dissolved into the liquid.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 19, 1993
    Assignee: Nalco Chemical Company
    Inventors: David W. Scheimann, Nang T. Bui
  • Composition for the paint detackification for both waterborne and solvent enamels
    Patent number: 4940491
    Abstract: Both waterborne and solvent enamels can be sprayed in a common paint spray booth and be detackified by a composition comprising a blend of a melamine-formaldehyde polymer, polyvinyl alcohol and a styrene acrylate copolymer. The invention also contemplates the use of these compositions in detackifying paint in paint spray booths.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: July 10, 1990
    Assignee: Nalco Chemical Company
    Inventors: Shu-Jen Huang, David W. Scheimann
  • Composition for the paint detackification for both waterborne and solvent enamels
    Patent number: 4888386
    Abstract: Both waterborne and solvent enamels can be sprayed in a common paint spray booth and be detackified by a composition comprising a blend of a melamine-formaldehyde polymer, polyvinyl alcohol and a styrene acrylate copolymer. The invention also contemplates the use of these compositions in detackifying paint in paint spray booths.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: December 19, 1989
    Assignee: Nalco Chemical Company
    Inventors: Shu-Jen W. Huang, David W. Scheimann