Patents by Inventor William C Webster

William C Webster 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).

  • Patent number: 6838504
    Abstract: The invention provides polymeric matrices and films comprising fixation reagents that are capable of reacting with solubilized metals to form less soluble metal compounds. The fixation reagenst may include inorganic sulfides and phosphates, as well as adsorbents. The polymeric matrices may be comprised of polyvinyl alcohols and polyvinyl acetates. In some embodiments, the polymeric matrix is selected to be at least as soluble as the selected fixation reagent, particularly under the conditions in which the matrix is expected to come into contact with the solublized metal.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: January 4, 2005
    Assignee: Solucorp Industries Ltd.
    Inventors: William C Webster, Peter Hurley
  • Patent number: 5877393
    Abstract: A process for treating contaminated waste to stabilize environmentally harmful heavy metals. The waste is contacted with a mixture of a sulfide, preferably calcium sulfide, an inorganic phosphate, which prevents oxidation of sulfide, and a base that at least includes calcium hydroxide. The process stabilizes harmful, heavy metal materials in the waste but avoids the prior art disadvantage of emitting hydrogen sulfide.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: March 2, 1999
    Assignee: Solucorp Industries, Ltd.
    Inventor: William C. Webster
  • Patent number: 5584792
    Abstract: A method for stabilizing wet, oily petroleum refinery wastes and other similar wastes without the need for Portland cement. The waste is combined with at least 5 weight percent of a novel cementitious reagent composition comprised of Powder River Basin fly ash and circulating fluid bed combustion ash in weight ratios ranging from 1:9 to 9:1.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: December 17, 1996
    Inventor: William C. Webster
  • Patent number: 4377414
    Abstract: Strong dense shaped articles such as pellets suitable for use as gravel substitutes are produced by the described method from solid fly ash-containing water materials obtained by a lime based dry scrubbing flue gas desulfurization operation. In this method the dry ash-containing waste powder, which also contains calcium sulfite or sulfate reaction products and unreacted lime, is first uniformly contacted with a critical amount of water and then immediately compacted at a critical compaction ratio to provide a handleable green body in which the fly ash particles are positioned with respect to one another so that the interstitial spaces are sufficient to accommodate the volumetric changes in wthe cementitious materials without any deleterious expansion of the article as the article is cured.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: March 22, 1983
    Assignee: A/S Niro Atomizer
    Inventors: John C. Buschmann, Elizabeth L. Rasmussen, William C. Webster, Preston L. Veltman
  • Patent number: 4354876
    Abstract: Cured compacted products suitable for use as landfill materials, embankments, roadbase compositions and the like are produced by the described method from fly ash-containing waste materials obtained by a lime based dry scrubbing flue gas desulfurization operation. In this method the dry fly ash-containing waste powder, which also contains calcium sulfite or sulfate reaction products and unreacted lime, is contacted with a predetermined amount of water and mixed under critical mixing conditions to provide a powder/water mixture which is placed at a suitable utilization site, e.g., a landfill disposal site, and compacted under sufficient load to achieve at least about 70% of the laboratory dry density. The resulting products have compressive strengths after curing of at least about 25 psi and permeabilities of less than 1.times.10.sup.-5 cm/sec.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: October 19, 1982
    Assignee: Webster & Assoc. Ltd.
    Inventor: William C. Webster
  • Patent number: 4259271
    Abstract: Improved method for making generally spherical particulate shot-like product comprising permitting a siliceous-aluminous composition of specified characteristics onto a rotating squirrel cage rotor near top dead center thereof and causing said impinging molten material to be projected in droplet form and cooled while suspended in a gaseous cooling medium, such as air, into an amorphous generally spherical product, suitable for use as an abrasive or filler material.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: March 31, 1981
    Inventors: L. John Minnick, William C. Webster, Charles L. Smith
  • Patent number: 4153655
    Abstract: Methods of making finely divided product from fly ash compositions, including both dry fly ash compositions and aqueous suspensions of fly ash in combination with alkaline earth metal compounds. The fly ash composition, preferably including 10 to 50% combined alkaline earth metal oxides, is heated to molten condition while collecting gases evolving therefrom, including sulfur oxide gases. The top portion of the melt is then poured in a manner causing a molten stream thereof to be divided into a multiplicity of fractions and cooled to solid form while encompassed by a fluid cooling medium in a manner to produce either a shot or a granulated aggregate product. The bottom portion of the melt is nearly pure metallic iron which is recovered, as such, for other uses. Preferably, the molten stream impinges on a rotating member in a manner to produce shot, or is quenched in a water bath to form a granulated type product.
    Type: Grant
    Filed: July 23, 1976
    Date of Patent: May 8, 1979
    Inventors: Leonard J. Minnick, William C. Webster, Charles L. Smith
  • Patent number: 4028130
    Abstract: Digested sewage sludge resulting from sewage plant treatment of municipal sewage is disposed of and used in an ecologically acceptable manner by the incorporation of such sludge in hardenable compositions further including, for example, lime, fly ash and, in some cases, alkaline earth metal sulfates and/or soil or other inert or complimentary additives. These hardenable compositions may be emplaced in an area open to the atmosphere and permitted to cure over a period of time to act as land fill or as road base materials.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: June 7, 1977
    Assignee: IU Conversion Systems, Inc.
    Inventors: William C. Webster, Robert G. Hilton, Ronald F. Cotts
  • Patent number: 4018619
    Abstract: Improved cementitious composition results from a process comprised of mechanical size reduction and activation of a mixture of lime and fly ash and the addition thereto of fly ash and aggregate, as needed, to make a mix of the desired proportions. A quicker and more complete reaction between the lime and fly ash results from deagglomeration of lime particles caused by interaction with the fly ash and/or by the increased availability of reactant materials due to particle size reduction of both the lime and the fly ash. The mechanical size reduction and activation process may be carried out, for example, in a ball mill or centrifugal impact mill.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: April 19, 1977
    Assignee: IU Technology Corporation
    Inventors: William C. Webster, Charles L. Smith
  • Patent number: RE29783
    Abstract: Waste sludges containing small amounts of certain types of reactive materials are treated by adding to such sludges materials capable of producing aluminum ions, lime and/or sulfate bearing compounds to produce a composition having a sufficient concentration of sulfate ions, aluminum ions and equivalents thereof, and calcium ions and equivalents thereof. Fly ash is preferred source of aluminum ions for this purpose. Over a period of time such compositions harden by the formation of calcium sulfo-aluminate hydrates. Hardening of the sludge facilitates its disposition and may permit the reclamation of the land now occupied by large settling ponds for such sludge. Still further, the solidification of such settling ponds may provide permanent land fill which permits immediate use of the land without the necessity for removal of the sludge. Aggregate materials may also be incorporated in the solidified waste.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: September 26, 1978
    Assignee: IU Technology Corporation
    Inventors: Charles L. Smith, William C. Webster