Patents Represented by Attorney Stephen Bobb

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  • Thermoplastic materials
    Patent number: 4704424
    Abstract: Various type A zeolites can be combined with thermoplastic materials to provide antiblock and improved optical properties to films or sheets of said thermoplastic. The zeolites are of less than full hydration, and at least a portion of the sodium is replaced with multivalent ions such as calcium and magnesium. The zeolites can also be acid treated to provide zeolites that contain hydronium ions.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: November 3, 1987
    Assignee: PQ Corporation
    Inventor: Bruce W. Sands
  • Explosive systems
    Patent number: 4664728
    Abstract: Water-based explosives that use siliceous boron-containing microspheres as sensitizing agents are stabilized by adding multivalent metal ions to the explosives. Zinc salts are especially useful.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: May 12, 1987
    Assignee: PQ Corporation
    Inventors: James P. Cunnion, Jr., Bruce W. Sands
  • Treating beer to prevent chill haze
    Patent number: 4631193
    Abstract: The components of chill haze in beer can be removed by contacting said beer with a combination of silica hydrogel and gelatin for a time sufficient to complete adsorption of the components and removing said adsorbents from the beer.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: December 23, 1986
    Assignee: PQ Corporation
    Inventor: Michael T. Sobus
  • Zinc rich paint vehicle
    Patent number: 4230496
    Abstract: Aqueous organic ammonium silicate-alkali metal silicate combination vehicles for zinc-rich, corrosion-resistant paints are improved by the addition of organosilicone-silicate polymers. The improvement is manifested by increased adhesion to poorly prepared metal surfaces and harder paint films.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: October 28, 1980
    Assignee: PQ Corporation
    Inventors: James S. Falcone, Jr., Robert W. Spencer