Patents by Inventor Josef Burgert

Josef Burgert 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).

  • Process for the preparation of iron ion containing water-absorbent polymers with low residual monomer content
    Publication number: 20050154146
    Abstract: The residual monomer content of water-absorbent carboxyl-containing polymers is reduced using iron ions.
    Type: Application
    Filed: May 19, 2003
    Publication date: July 14, 2005
    Inventor: Josef Burgert
  • Surface crosslinked and surfactant coated absorbent resin particles and method of preparation
    Patent number: 5633316
    Abstract: The invention is surface crosslinked particles of water absorbing resin comprising particles of a carboxyl containing water-absorbent resin; wherein the particles of the carboxyl containing water-absorbent resin are crosslinked at or near the particle surface by a polyhydroxy compound capable of reacting with the carboxyl moieties of the water-absorbent resin, and the particles have coated on or bound to the surface a nonionic surfactant having an HLB of from 3 to 10.Additionally a process for the preparation of such surface crosslinked and surfactant coated absorbent resin particles is disclosed. Further disclosed is a water-absorbent structure comprising a synthetic or natural fiber or paper based woven or nonwoven carrier structure and surface crosslinked and surfactant coated water-absorbent resin particles of this invention.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: May 27, 1997
    Assignee: The Dow Chemical Company
    Inventors: Herbert Gartner, Josef Burgert