Patents Represented by Attorney J. S. Bobb

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  • Porous zeolite granules stable in aqueous solutions
    Patent number: 4613578
    Abstract: Porous granules that contain separate particles of alkali metal silicate and zeolite are stable and are efficient ion exchangers in aqueous effluents and/or solutions. Said granules are heated to provide the stability required so that even though some silicate may dissolve when the granules are exposed to water, the zeolite does not disperse throughout the water.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: September 23, 1986
    Assignee: PQ Corporation
    Inventor: Elliot P. Hertzenberg
  • Treating chrome tanning bath recycle stream
    Patent number: 4200527
    Abstract: The recycle stream from chrome tanning baths can be treated with magnesium silicate to reduce the amount of suspended solids. The treated stream can be recycled more times, thereby providing a considerable savings of chrome values.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: April 29, 1980
    Assignee: PQ Corporation
    Inventors: Vincent J. Cassella, Mazin R. Irani