Patents Assigned to Van R Dental Products, Inc.
  • Hydrocollid gel based dental impression composition
    Patent number: 4772324
    Abstract: A dental impression composition is provided which has relatively lower water content for higher tensile and gel strengths, and an effective amount of dipopylene gylcol to offset the reduced amount of water and provide workability in the composition at storage tempering temperatures of as little as 130.degree. F.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: September 20, 1988
    Assignee: Van R Dental Products, Inc.
    Inventors: Don D. Porteous, Ornan Valle
  • High strength dental impression composition
    Patent number: 4648906
    Abstract: A dental impression composition is provided which has high tensile and gel strengths, but an absence of graininess through the use of zinc borate and a water soluble alkylene glycol in the composition.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: March 10, 1987
    Assignee: Van R Dental Products, Inc.
    Inventors: Don D. Porteous, Ornan Valle
  • Gingival retraction cord with wet, drip-free astringent
    Patent number: 4617950
    Abstract: An astringent retraction cord for use in dental therapeutics is provided by coating a gingival retraction cord with an astringent gel containing an astringent salt such as aluminum potassium sulfate and a bodying agent sufficient to stiffen the salt solution to stand on the cord. The gel coated retraction cord is adapted to be inserted into the gingival sulcus to effect retraction of gingival tissue.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: October 21, 1986
    Assignee: Van R Dental Products, Inc.
    Inventors: Don D. Porteous, Paul M. Wittrock
  • Braided gingival retraction cord
    Patent number: 4321038
    Abstract: A gingival tissue retraction cord is provided which comprises a suitably dimensioned, moderately firm, flexible, multistrand, braided, absorbent cord impregnated with an effective amount of gingival tissue retraction material. The retraction cord is adapted to be inserted into the gingival sulcus to effect retraction of gingival tissue.
    Type: Grant
    Filed: July 18, 1980
    Date of Patent: March 23, 1982
    Assignee: Van R Dental Products, Inc.
    Inventor: Don D. Porteous