Patents Represented by Attorney Ernest Posner

Find this attorney in the Justia Lawyer Directory

  • Surface treated silica
    Patent number: 4029513
    Abstract: Microfine silicas that are useful as rubber reinforcing fillers and thickening agents, and are readily dispersible are prepared by modifying the surface layer of the silica. The surface modification results from including in or affixing to the surface of the silica certain inorganic polyvalent ions.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: June 14, 1977
    Assignee: Philadephia Quartz Company
    Inventors: Eric W. Vessey, James R. Miller, Klaus Robert Lange
  • Soluble silicate disks
    Patent number: 3967972
    Abstract: Fracture and stress free disks of alkali metal silicate are prepared by casting molten silicate glass in cylindrical molds with a very short vertical dimension and cooling. Said disks constitute dust free products or can be further processed into other dust free products.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: July 6, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: Frank J. Lazet
  • Precipitating .alpha. alumina monohydrate
    Patent number: 3966893
    Abstract: Dispersible colloidal particles of .alpha. alumina monohydrate are prepared by conditioning aqueous solutions of an aluminum salt with an organic solvent and the precipitating alumina with an aqueous solution of base. The reaction mixture is heated under pressure, filtered, washed and dried to obtain the product.
    Type: Grant
    Filed: December 2, 1974
    Date of Patent: June 29, 1976
    Assignee: Philadelphia Quartz Company
    Inventors: M. Robert Derolf, Elliot P. Hertzenberg
  • Method of preparing modified hollow, largely spherical particles by spray drying
    Patent number: 3960583
    Abstract: Products of a generally spherical nature with particulate matter embedded in the walls are prepared by forming a suspension of said particulate matter in a solution of a film-forming substance in a volatile solvent, spray drying said suspension-solution thereby forming the product which may be further dried if necessary to remove solvent and to "set" the walls. Such products can be used to provide pigmenting, reactive and/or fire retardant properties to organic systems to which they are added as fillers. The density of the product can also be controlled by this method for use as fillers in applications in which segregation of such fillers from the plastic matrix is normally a problem.
    Type: Grant
    Filed: May 2, 1974
    Date of Patent: June 1, 1976
    Assignee: Philadelphia Quartz Company
    Inventors: David I. Netting, Elliot P. Hertzenberg
  • Preparation of alkali metal and quaternary nitrogen double salts of silicic acid
    Patent number: 3959274
    Abstract: Double silicate salts of alkali metals and quaternary nitrogen compounds are prepared by the reaction of (a) an alkylene oxide, (b) an amine, and (c) an alkali metal silicate.
    Type: Grant
    Filed: July 9, 1973
    Date of Patent: May 25, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: Helmut Hans Wilhelm Weldes
  • Method of forming stable dispersions of alumina
    Patent number: 3954659
    Abstract: Stable aqueous dispersions of alumina are formed at concentrations of above about 25% Al.sub.2 O.sub.3 by dispersing alumina dried with a strongly acidic solution. Said stable aqueous dispersions of alumina are stable for at least 2.5 months.
    Type: Grant
    Filed: February 5, 1974
    Date of Patent: May 4, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: James H. O'Brien
  • Crystallized alkali metal silicate with sequestering agents
    Patent number: 3941723
    Abstract: Composite crystals of alkali metal silicate, particularly hydrated sodium metasilicates such as sodium metasilicate pentahydrate with sequestering agents, are formed by co-crystallization of liquors that contain both alkali metal silicate and sequestering agents.
    Type: Grant
    Filed: May 14, 1971
    Date of Patent: March 2, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: Helmut H. Weldes