Patents Represented by Attorney Robert G. Danehower
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Patent number: 4292189Abstract: A thermal energy storage composition is disclosed that stores heat upon melting and releases heat upon solidification. It is composed of a mixture of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium borate decahydrate and a thickening agent. Its good heat transfer characteristics, relatively high latent heat of fusion, low cost, and favorable melting point allow this material to be particularly useful for space heating applications.Type: GrantFiled: July 30, 1979Date of Patent: September 29, 1981Assignee: Pennwalt CorporationInventor: Johnson C. Chen
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Patent number: 4264653Abstract: A process for coating steel with a non-dripping pickle oil is disclosed. The coating process uses a heated hydrocarbon oil containing a long-chain linear alcohol as the coating medium. The alcohol converts the hydrocarbon oil into a meso-solid at ambient temperatures. The coating provides corrosion protection for the steel during storage and shipping. The process is also applicable for converting slushing oils and oils for drawing and stamping of metal into meso-solid coatings.Type: GrantFiled: September 24, 1979Date of Patent: April 28, 1981Assignee: Pennwalt CorporationInventor: Frank P. Lochel, Jr.
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Patent number: 4255192Abstract: Dispersed phase dental alloy made by mechanically blending mixtures of lathe cut dental amalgam alloy particles and spheroidal silver-copper alloy particles has superior properties as an amalgam when a mechanical blend of the mixture of alloy particles is treated prior to amalgamation with dilute aqueous mineral acid solutions or with methyl alcohol.Type: GrantFiled: December 17, 1979Date of Patent: March 10, 1981Assignee: Pennwalt CorporationInventor: Charles F. Burns
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Patent number: 4250046Abstract: Metalworking fluids containing diethanol disulfide in effective amounts to provide extreme pressure and anti-wear properties are disclosed. A preferred metalworking fluid is an aqueous solution of diethanol disulfide and water-soluble polyoxyalkylene glycols. Concentrates and use solutions are disclosed.Type: GrantFiled: March 5, 1979Date of Patent: February 10, 1981Assignee: Pennwalt CorporationInventor: John L. Przybylinski
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Patent number: 4227932Abstract: A pulverulent single component potassium silicate cement composition is disclosed and claimed which is capable of being installed by the dry gunite method utilizing water addition at the nozzle to produce a dense continuous quick setting acid resistant cement on horizontal, sloping, vertical and overhead surfaces. The cement composition comprises a special hydrated potassium silicate water glass powder, an acid releasing hardener, and a filler such as silica sand. The composition of the potassium silicate and the proportions of the ingredients must be closely regulated to obtain satisfactory cements. The potassium silicate cement opens a new era of silicate monolithic linings which provide maximum resistance to acid environments other than hydrofluoric acid.Type: GrantFiled: February 21, 1979Date of Patent: October 14, 1980Assignee: Pennwalt CorporationInventors: George R. Leah, Robert R. Pierce
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Patent number: 4180495Abstract: Polyesters, polyamides and polyester-polyamides are flame retarded by incorporating a flame retardant amount of selected poly(metal phosphinate)s with the resins. The poly(metal phosphinate)s can be incorporated with the resins either by admixture of the poly(metal phosphinate)s with the polyester or polyamide or by adding the poly(metal phosphinate)s to the polyester or polyamide polymerization reaction whereby the poly(metal phosphinate)s become a part of the polymer structure.Type: GrantFiled: April 13, 1978Date of Patent: December 25, 1979Assignee: Pennwalt CorporationInventor: Stanley R. Sandler
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Patent number: 4148814Abstract: A process is provided for preparing monohydrocarbyltin trihalides, RSnX.sub.3, wherein R is an alkyl, cycloalkyl, alkaryl, aryl or aralkyl group of 1-24 carbon atoms, and X is a halogen atom by the redistribution reaction between a tetrahydrocarbyltin, R.sub.4 Sn, a trihydrocarbyltin halide, R.sub.3 SnX, or a dihydrocarbyltin dihalide, R.sub.2 SnX.sub.2, and a tin tetrahalide, SnX.sub.4, in the presence of sulfonium or isothiuronium salts as catalysts.Type: GrantFiled: August 29, 1977Date of Patent: April 10, 1979Assignee: Pennwalt CorporationInventor: Gerald H. Reifenberg
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Patent number: 4139587Abstract: An improved process for preparing compacts of finely divided fluorspar for metallurgical use is provided in which water, hydrated lime and molasses are added in specified ratios to fluorspar in a heated mixing vessel. The water facilitates the formation of a lime-molasses coating on the fluorspar particles and impedes reaction of the lime and molasses. The water also provides evaporative cooling of the mixture, subsequent to the mixing operation, causing the molasses to become much more viscous and, resultingly, the mixture to be much less tacky so that it can be efficiently compacted immediately. Following compaction in a compacting machine the compacts are heated in an oven to force the lime and molasses reaction to completion providing a water insoluble binder for the fluorspar particles.Type: GrantFiled: December 9, 1977Date of Patent: February 13, 1979Assignee: Pennwalt CorporationInventor: Robert J. Cox
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Patent number: 4129584Abstract: A process is provided for preparing dimethyltin dichloride by the reaction of tin metal and methyl chloride in the presence of sulfonium or isothiuronium salts as catalysts.Type: GrantFiled: August 29, 1977Date of Patent: December 12, 1978Assignee: Pennwalt CorporationInventor: Gerald H. Reifenberg
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Patent number: 4081395Abstract: This invention discloses alkaline detergent compositions for cleaning solid surfaces including returnable food and beverage containers such as are used for milk, ice cream mixes, soft drinks and similar materials. The alkaline detergent compositions are particularly adapted for cleaning bottles fabricated from polycarbonate resins without damaging the polycarbonate but are also useful on glass, polypropylene and polyethylene surfaces. Granular detergents, aqueous concentrates and aqueous use solutions are described. The alkaline detergents can be used in mechanical spray or soak-tank washers.Type: GrantFiled: March 25, 1976Date of Patent: March 28, 1978Assignee: Pennwalt CorporationInventor: Charles Bullick Talley
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Patent number: 4047959Abstract: Stable nonionic water emulsions of the flame retardant (2,3-dibromopropyl)phosphate are disclosed and claimed. The water emulsions are achieved by use of a ketone solvent and one or more nonionics from selected groups which when used have a sole or combined HLB in the range of about 10 to 14. The stable emulsions are compatible with all water repellents including the cationic fluorochemical oil and water repellents.Type: GrantFiled: February 9, 1976Date of Patent: September 13, 1977Assignee: Pennwalt CorporationInventor: George Paul Guzzardo
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Patent number: 3999957Abstract: Metal surfaces moving at high speeds are coated with a chromium-resin containing layer having improved adhesion and resistance to deformation. The coatings provide corrosion resistance to the metal as well as enhancing its appearance when a pigment is added. The improved metal coatings are obtained by processes which apply an aqueous dispersion containing a water soluble dichromate of a metal, a reducing agent for the dichromate consisting of a mixture of a lower alkanolamine and a hexitol, and an acrylic resin mixture consisting of about 5 to 22% by weight of thermosetting acrylic tetrapolymer and 95 to 78% by weight of thermoplastic acrylic copolymer to the metal surface and thereafter heating the metal to evaporate water and form a coating on the metal at a temperature ranging from about 180.degree. to 275.degree. F. and then curing the coating while simultaneously reducing the chromium in the dichromate by heating the metal within the range of about 400.degree. to 500.degree. F. for at least 2 seconds.Type: GrantFiled: June 5, 1974Date of Patent: December 28, 1976Assignee: Pennwalt CorporationInventor: Singkata Tongyai
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Patent number: 3998984Abstract: Sodium tetraborate based carrier coatings for wire drawing are prepared by dispersing a water insoluble fatty acid metal salt in a sodium tetraborate coating bath. The carrier coatings on rod are made resistant to atmosphere moisture by heating at an elevated temperature.Carrier coatings on wire rod provide a vehicle to pick up the wire drawing lubricant in the soap box and carry the lubricant into the die. Since the coated wire rod is often stored for long periods between coating and drawing it is susceptible to corrosion from atmospheric moisture.Type: GrantFiled: November 14, 1975Date of Patent: December 21, 1976Assignee: Pennwalt CorporationInventor: Walter Andrew Smigel
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Patent number: 3992362Abstract: Tertiary amyl phenol sulfides are made in flaked form by reacting tertiary amyl phenol with sulfur monochloride at a mole ratio of 0.7 to 0.95 moles of the phenol to one mole of sulfur monochloride. The hot liquid reaction product is then flaked on a cooled surface. The use of tertiary amyl phenol sulfides as a sulfur donor in the vulcanization of rubber is facilitated by its ease of shipping and handling in flaked form.Type: GrantFiled: August 14, 1975Date of Patent: November 16, 1976Assignee: Pennwalt CorporationInventor: Le Roy Martin
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Patent number: 3990842Abstract: Many textile fibers are dyed in dye baths requiring an acidic aqueous medium to give effective dyeing. Dyeing processes and dye baths are disclosed in which the aqueous acidic medium is controlled and the pH adjusted by the use of ammonium silicofluoride.Type: GrantFiled: May 15, 1975Date of Patent: November 9, 1976Assignee: Pennwalt CorporationInventor: William Alexander Millsaps
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Patent number: 3965016Abstract: Complex sulfides of antimony are used as lubricant additives which are effective in imparting extreme pressure and anti-wear properties to lubricants.Type: GrantFiled: May 27, 1975Date of Patent: June 22, 1976Assignee: Pennwalt CorporationInventor: John Richard Soulen
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Patent number: 3961111Abstract: Anodized aluminum oxide coatings are sealed in hot water containing [N-methyl - N - (3-dimethylamino - propyl)-n-perfluorooctylsulfonamide] methylammonium iodide, [N-ethyl-n-perfluorooctyl - sulfonamido tridecaethyleneoxy) ethanol and/or a copolymer of 70% by weight methacrylic acid and 30% by weight ethyl acrylate.Type: GrantFiled: March 18, 1975Date of Patent: June 1, 1976Assignee: Pennwalt CorporationInventor: Harold Vernon Smith, deceased
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Patent number: 3957553Abstract: Alkaline etching baths for aluminum are claimed in which oxidizing agents at low concentration replace chromates and fluorides in the control of galvanizing. Etching processes using these new baths are also disclosed and claimed.Type: GrantFiled: March 1, 1974Date of Patent: May 18, 1976Assignee: Pennwalt CorporationInventor: Harold Vernon Smith
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Patent number: 3954648Abstract: This invention relates to liquid compositions and methods of using them for removing coatings from coated metal surfaces, particularly metals, and especially those metals subject to attack by corrosive liquids. The compositions comprise from one-fourth to about 10% by weight of alkali metal hydroxide, from 40 to about 60% by weight of at least one liquid high boiling oxygenated solvent, and from 40 to about 60% by weight of at least one liquid high boiling amine. Optionally, the compositions may contain from one-half to about 20% by weight of a surface active or wetting agent.The method of use comprises applying the anhydrous liquid composition to the coated object at a temperature from ambient up to the boiling point of the composition for a time sufficient to loosen or remove the coating.Type: GrantFiled: February 5, 1973Date of Patent: May 4, 1976Assignee: Pennwalt CorporationInventors: Edward John Belcak, Leo Francis Corcoran
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Patent number: RE29093Abstract: A process is provided for tabletting spherical dental amalgam alloy. The process comprises treating the particles of spherical alloy by contacting them with a hydrochloric acid solution of cupric chloride, separating the acidic cupric chloride solution from the spherical alloy particles, washing the spherical alloy particles with water, drying the spherical alloy particles to remove residual water and then compacting the treated spherical alloy particles into a solid form such as a tablet.Type: GrantFiled: April 12, 1976Date of Patent: December 28, 1976Assignee: Pennwalt CorporationInventor: Charles Francis Burns