Patents by Inventor Donnan Edwin Priester

Donnan Edwin Priester 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 aid for melt processible polymers
    Patent number: 6048939
    Abstract: Processability of non-fluorinated melt-processible polymers is improved by introducing a process aid comprising a fluoroelastomer latex or aqueous fluoropolymer dispersion to the non-fluorinated polymer and extruding the blend.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: April 11, 2000
    Assignee: Dupont Dow Elastomers, L.L.C.
    Inventor: Donnan Edwin Priester
  • Processing aid system for polyolefins
    Patent number: 5707569
    Abstract: Polar-side-group-containing extrusion adjuvants, such as ethylene diamine tetraacetic acid or ionomer, that counteract the deleterious effect of certain additives such as zinc stearate, used in polyolefins on the performance of fluoropolymer processing aids in polyolefins are taught.
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: January 13, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donnan Edwin Priester, Charles Winfield Stewart