Patents Represented by Attorney James M. Kuszaj
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Patent number: 4490262Abstract: The servicing of wellbores with a high density fluid to maintain an elevated pressure on a portion of the formation penetrated by the well is improved. The improvement comprises injecting as the high density fluid a substantially solids-free aqueous solution of calcium bromide and zinc bromide having a density of at least about 15 pounds per gallon. The aqueous solution is prepared by reacting hydrogen bromide with zinc or compounds of zinc in the presence of an aqueous calcium bromide solution.Type: GrantFiled: November 24, 1981Date of Patent: December 25, 1984Assignee: The Dow Chemical CompanyInventors: Randall C. Stauffer, Andrew J. Pasztor
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Patent number: 4347194Abstract: Polyhydroxyl polyether compounds containing at least one monomeric unit each of the formulae: ##STR1## are disclosed. Polymeric condensation resins are prepared by allowing the polyhydroxyl polyethers to react with polyfunctional chain-forming compounds containing functional groups reactive with the hydroxyl groups of polyhydroxyl polyethers. The polyhydroxyl polyether compounds enhance the flame-retardant properties of polymeric condensation resins such as polyurethanes.Type: GrantFiled: May 11, 1981Date of Patent: August 31, 1982Assignee: The Dow Chemical Co.Inventors: Sally P. Ginter, Chester E. Pawloski, Violete L. Stevens
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Patent number: 4330525Abstract: High density, dead burned refractory magnesia (MgO) is produced by sintering compacts formed by simultaneously thermally dehydrating and mechanically working an aqueous slurry of magnesium hydroxide.Type: GrantFiled: December 29, 1980Date of Patent: May 18, 1982Assignee: The Dow Chemical Co.Inventors: Jack B. Reynolds, Charles R. Amos
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Patent number: 4309477Abstract: A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal sulfide.Type: GrantFiled: January 3, 1977Date of Patent: January 5, 1982Assignee: The Dow Chemical CompanyInventor: Paul A. Pezzoli
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Patent number: 4304677Abstract: The servicing of wellbores with a high density fluid to maintain an elevated pressure on a portion of the formation penetrated by the well is improved. The improvement comprises injecting as the high density fluid a substantially solids-free aqueous solution of calcium bromide and zinc bromide having a density of at least about 15 pounds per gallon. The aqueous solution is prepared by reacting hydrogen bromide with zinc or compounds of zinc in the presence of an aqueous calcium bromide solution.Type: GrantFiled: September 5, 1978Date of Patent: December 8, 1981Assignee: The Dow Chemical CompanyInventors: Randall C. Stauffer, Andrew J. Pasztor
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Patent number: 4298709Abstract: Polyhydroxyl polyether compounds containing at least one monomeric unit each of the formulae: ##STR1## are disclosed. Polymeric condensation resins are prepared by allowing the polyhydroxyl polyethers to react with polyfunctional chain-forming compounds containing functional groups reactive with the hydroxyl groups of polyhydroxyl polyethers. The polyhydroxyl polyether compounds enhance the flame-retardant properties of polymeric condensation resins such as polyurethanes.Type: GrantFiled: June 25, 1980Date of Patent: November 3, 1981Assignee: The Dow Chemical CompanyInventors: Sally P. Ginter, Chester E. Pawloski, Violete L. Stevens
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Patent number: 4297475Abstract: Flame retardant intumescent polyamides comprising repeating structural units of the formulas ##STR1## wherein X is independently chloro or bromo, and n and n' are each independently a positive integer are disclosed.Type: GrantFiled: April 24, 1978Date of Patent: October 27, 1981Assignee: The Dow Chemical Co.Inventors: Linnea E. Nelson, Charles E. Reineke
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Patent number: 4234377Abstract: A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal ferrocyanide.Type: GrantFiled: November 2, 1976Date of Patent: November 18, 1980Assignee: The Dow Chemical CompanyInventor: Paul A. Pezzoli
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Patent number: 4219725Abstract: A heating apparatus for the vaporization of a mixture of two liquefied gases in chemical equilibrium with a binary compound thereof includes a vertically disposed enclosed vessel having a lower liquid zone to which the mixture to be vaporized is supplied as a liquid from an external supply source and an upper vaporized gas zone from which gas can be removed for use. A vertically disposed heating element, which may be an electric heating element, steam tube, and the like, extends downwardly in the vessel through the vaporized gas zone and terminates above the portion of the liquid zone communicating with the liquid supply and is adapted to supply sufficient heat to vaporize a gaseous mixture from the liquid zone. A housing is disposed about the heating element in spaced relationship thereto and a heat transfer medium is contained within the space.Type: GrantFiled: August 1, 1978Date of Patent: August 26, 1980Assignee: The Dow Chemical CompanyInventor: Greg D. Groninger
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Patent number: 4210621Abstract: A method of applying a vermicular expanded graphite composite material to the interior surface of a conduit by a two-step in situ compression process is disclosed.Type: GrantFiled: March 23, 1978Date of Patent: July 1, 1980Assignee: The Dow Chemical CompanyInventors: John A. Snover, R. Scott Caines
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Patent number: 4199628Abstract: The present invention relates to a vermicular expanded graphite composite material and to an improved method for preparing such material by blending vermicular expanded graphite with a corrosion resistant resin dispersed in a carrier, vaporizing the carrier, and heating the composite material to sinter the resin. Compressed forms of the composite material are useful for protecting corrosion vulnerable substrates.Type: GrantFiled: March 23, 1978Date of Patent: April 22, 1980Assignee: The Dow Chemical CompanyInventor: Ronald S. Caines
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Patent number: 4197262Abstract: Organic halides containing at least one halogen-replaceable bromine atom are reacted with chlorine in the presence of a catalyst selected from the group consisting of the halides of antimony, tin, zinc, or vanadium to form a corresponding organic halide having at least the one bromine atom replaced by a chlorine atom.Type: GrantFiled: November 3, 1978Date of Patent: April 8, 1980Assignee: The Dow Chemical CompanyInventor: Ralph A. Davis
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Patent number: 4194068Abstract: Liquid flame-retardants for polyurethane compositions are disclosed. The liquid flame-retardants contain a mixture of a bromohydrin of pentaerythritol, a polyhydric alcohol, and a sufficient amount of a flame-retardant organo-phosphorus compound to render the mixture a substantially solids-free liquid at 25.degree. C., one atmosphere pressure. Illustrative of these flame-retardants is a solution of 2,2-bis(bromomethyl)-1,3-propanediol, a cyclic phosphonate ester of the formula ##STR1## where x=0 or 1, and a poly(oxypropylene) adduct of glycerol having an average molecular weight of about 300.Type: GrantFiled: March 21, 1978Date of Patent: March 18, 1980Assignee: The Dow Chemical CompanyInventors: Dennis P. Miller, Masahiko Tamaki
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Patent number: 4181585Abstract: An electrode suitable for use in an electrolytic cell is dissolved. The electrode comprises: an electroconductive substrate with at least a portion of the surface thereof being a solderable metal. The electroconductive substrate abuttingly joins a film-forming metal by means of an electrically conductive, fused, non-ferrous bonding layer interposed between the solderable metal surface of the substrate and the inner surface of the film-forming metal. At least a portion of the inner surface of the film-forming metal is a solderable metal. At least a portion of the outer surface of the film-forming metal is electrocatalytically active and corresponds at least partially to the working area of the electrode. A method of producing the electrode, and its use as an anode in the electrolytic production of chlorine are also disclosed.Type: GrantFiled: July 3, 1978Date of Patent: January 1, 1980Assignee: The Dow Chemical CompanyInventor: Robert J. Pangborn
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Patent number: 4179298Abstract: Flame retardant intumescent polyamides comprising repeating structural units of the formulas ##STR1## wherein X is independently chloro or bromo, and n and n' are each independently a positive integer are disclosed.Type: GrantFiled: January 18, 1978Date of Patent: December 18, 1979Assignee: The Dow Chemical CompanyInventors: Linnea E. Nelson, Charles E. Reineke
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Patent number: 4171405Abstract: A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal molybdate.Type: GrantFiled: January 3, 1977Date of Patent: October 16, 1979Assignee: The Dow Chemical CompanyInventor: Paul A. Pezzoli
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Patent number: 4168346Abstract: A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal tungstate.Type: GrantFiled: January 3, 1977Date of Patent: September 18, 1979Assignee: The Dow Chemical CompanyInventor: Paul A. Pezzoli
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Patent number: 4163371Abstract: An apparatus and method for the vaporization of a mixture of two liquefied gases in chemical equilibrium with a binary compound thereof. The apparatus comprises an enclosed vessel having a liquid zone and a vaporized gas zone. A liquid supply means, in fluid communication with the liquid zone, passes the mixture to be vaporized as a liquid from a supply source into the vessel. A heating element, having a housing disposed about it, extends downward through a portion of the interior of the vessel and is adapted to supply sufficient heat to vaporize a gaseous mixture from the liquid zone. Means for superheating and removing the vaporized gaseous mixture from the vessel are provided. The method of vaporization comprises withdrawing the mixture as a liquid from a supply source and passing it into the vessel to form a liquid phase.Type: GrantFiled: August 24, 1977Date of Patent: August 7, 1979Assignee: The Dow Chemical CompanyInventor: Greg D. Groninger