With Organic Material Patents (Class 106/38.35)
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Patent number: 11794236Abstract: The present invention relates to a casting core for casting molds, wherein the casting core contains or consists of ceramic particles bound with a silica sol. The casting core has a pore structure, in which the average pore size of the pores increases at least in sections from the outside to the inside in the casting core. The present invention also relates to a method for producing the casting core according to the invention and to the use of the casting core according to the invention.Type: GrantFiled: September 19, 2019Date of Patent: October 24, 2023Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Matthias Busse, Christian Soltmann, Lukas Stumm, Franz-Josef Wöstmann
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Patent number: 10820972Abstract: This invention relates to a device for drying at least one object containing a liquid, in particular a dental restoration object (12). Said device comprises a means for generating thermal energy acting upon the object and sufficient for increasing the temperature of the object to the boiling point. Moreover, the device includes an impingement area for impinging on the object with thermal energy and a control device (24) that is characterized by the fact that a temperature detection element (20) of the device (10) measures the temperature of the object (12), and upon reaching a trigger temperature that is at the boiling temperature, somewhat below or somewhat above thereof, emits a signal to the control device.Type: GrantFiled: July 23, 2012Date of Patent: November 3, 2020Assignee: Ivoclar Vivadent AGInventors: Rudolf Jussel, Philipp Kettner
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Patent number: 10780109Abstract: A method of treating a tooth of a user. Initially, a tooth is cut to have an opening of at least 1 to 4 mm in the direction along an occlusal surface of the tooth, or a tooth already cut to have such an opening is located. Following ensuring that the opening is dry, powdered selenite is inserted into the opening. Subsequently, the powdered selenite is covered with a dental composite, thereby sealing the powdered selenite in the tooth.Type: GrantFiled: December 21, 2018Date of Patent: September 22, 2020Inventor: Laura Torrado
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Patent number: 10695826Abstract: A method of producing an investment casting ceramic core is provided that includes: providing a core body consisting of a leachable material; surrounding the core body with a mold composition within a vessel, which mold composition is configured to solidify; leaching the core body from the mold composition subsequent to the mold composition solidifying, thereby leaving an internal cavity within the solidified mold composition; depositing a ceramic composition within the internal cavity of the solidified mold composition; sintering the ceramic composition to a solid ceramic core; and removing the solid ceramic core from the mold composition.Type: GrantFiled: July 17, 2017Date of Patent: June 30, 2020Assignee: Raytheon Technologies CorporationInventors: Ryan C. Breneman, Steven J. Bullied
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Patent number: 10391670Abstract: A method of forming a cast component and a method of forming a casting mold is generally provided. The method is performed by plugging or covering an opening in a ceramic core-shell mold. The ceramic core-shell mold includes at least a first core portion, a first shell portion, and at least one first cavity between the core portion and the first shell portion. The core-shell mold may be manufactured using an additive manufacturing process. At least a portion of the ceramic core-shell mold and the plug or cover is coated with a second ceramic material.Type: GrantFiled: June 28, 2017Date of Patent: August 27, 2019Assignee: General Electric CompanyInventors: Xi Yang, Michael Cole, Michael Brown, Gregory Terrence Garay, Tingfan Pang, Brian David Przeslawski, Douglas Gerard Konitzer
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Patent number: 10029944Abstract: Methods of formulating, premixed cement-based tiling compositions and application of such premixed cement-based tiling compositions as an adhesive or grout. The premixed cement-based tiling compositions include a premixed cementitious slurry having a pH and an alkali activation constituent. The premixed cementitious slurry includes an aluminous or a calcium aluminate cement slurry in an amount of about 35 wt. % to 50 wt. % in combination with one or more filler or modifier materials present in an amount of about 40 wt. % to 65 wt. %. The alkali activation constituent destabilizes the premixed cementitious slurry by increasing the pH thereof to generate a reaction between the premixed cementitious slurry and the alkali activation constituent resulting in the cement-based tiling composition for use as an adhesive or a grout. The alkali composition may be sodium hydroxide supersaturated with lithium carbonate.Type: GrantFiled: May 22, 2015Date of Patent: July 24, 2018Assignee: LATICRETE INTERNATIONAL, INC.Inventors: Rajeswari Kompalli, Randall P. Bright, Christoph Hahner, Karoline Cartee
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Patent number: 9714345Abstract: Described are organopolysiloxane compositions that are capable of cross-linking and/or of hardening by polyaddition reactions so as to produce elastomers or materials made of silicone. Further described, is how the composition is useful for making a dental impression in the context of preparing prostheses.Type: GrantFiled: December 12, 2011Date of Patent: July 25, 2017Assignee: BLUESTAR SILICONES FRANCE SASInventor: Marco Del Torto
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Patent number: 9433997Abstract: The present disclosure relates to an inorganic binder composition for casting, including: water glass of 40 to 70 parts by weight; nano-silica of 5 to 35 parts by weight; a Li-based water resistant additive of 0.1 to 10 parts by weight; an organic silicon compound of 0.1 to 10 parts by weight; and an anti-sand burning additive of 1 to 10 parts by weight. Furthermore, the present disclosure relates to a core manufactured by using the inorganic binder composition and a cast manufactured so as to include the core.Type: GrantFiled: November 30, 2015Date of Patent: September 6, 2016Assignee: DR AXION CO., LTD.Inventors: Man Sig Lee, Min A Bae, Myung Hwan Kim, Sang Ho Ha
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Patent number: 8567481Abstract: A binder for the production of sand cores and/or molds for foundries that includes sand mixed with an alkyl silicate, preferably tetraethyl silicate; an aqueous solution of an alkali metal silicate, preferably sodium silicate, which solution also contains an alkali metal hydroxide, preferably sodium hydroxide, where the ingredients in such mixture are preferably in given percentage ranges and are mixed until the sand shows a homogeneous aspect and constitution. Also method of manufacturing sand molds for foundries that includes mixing foundry sand with the aforementioned binder, blowing the sand mixed with the binder, having still between 0.5% to 2.5% of water, into a cold box by means of air that is at room temperature, and once the cold box mold has been filled with the sand, passing a hot air current through the sand to dry and harden the binder thus obtaining the foundry mold.Type: GrantFiled: December 18, 2009Date of Patent: October 29, 2013Assignee: Tenedora Nemak, S.A. de C.V.Inventors: Gilberto García-Tapia, Satish Jhaveri, Aldo Alberto Sáenz-Valadez, Abraham Velasco-Téllez, Emma Lizzet Cedillo-Saucedo, José Talamantes-Silva
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Patent number: 8426493Abstract: Disclosed is a foundry mix containing a sulfate and/or nitrate salt and its use to make foundry shapes by the warm-box, hot-box, no-bake, and cold-box process, the use of these foundry shapes to make metal castings, and the metal castings prepared by the process.Type: GrantFiled: September 1, 2010Date of Patent: April 23, 2013Assignee: ASK Chemicals L.P.Inventors: Ralph E. Showman, Sean B. Harmon
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Patent number: 8177900Abstract: Gypsum-based molding materials are customized by hydrating the molding material to workable (malleable) consistency with a moistening solution containing 0.001 to 60% polytetrafluoroethylene. The addition of latex results in a more flowable material.Type: GrantFiled: June 14, 2007Date of Patent: May 15, 2012Assignee: Cbite, Inc.Inventor: Jose Walter
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Publication number: 20120098157Abstract: A binder for the production of sand cores and/or molds for foundries that comprises mixing sand with an alkyl silicate, preferably tetraethyl silicate; an aqueous solution of an alkali metal silicate, preferably sodium silicate, which solution also contains an alkali metal hydroxide, preferably sodium hydroxide, is added to the mixture, and finally all of the above is mixed until the sand shows a homogeneous aspect and constitution. Another aspect of the invention comprises a method of manufacturing sand molds for foundries that comprises mixing foundry sand with the present invention binder, blowing the sand mixed with the binder, having still between 0.5% to 2.5% of water, into a cold box by means of air that is at room temperature, and once the cold box mold has been filled with the sand, passing a hot air current through the sand to dry and harden the binder thus obtaining the molds for foundry.Type: ApplicationFiled: December 18, 2009Publication date: April 26, 2012Inventors: Gilberto Garcia-Tapia, Satish Jhaveri, Aldo Alberto Saenz-Valadez, Abraham Velasco-Tellez, Emma Lizzet Cedillo-Saucedo, José Talamantes-Silva
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Patent number: 8083845Abstract: Composition and process of a composition of additivated sodic bentonite through the addition of dextrin and sugar (saccharose), preferably refined sugar, or starch and sugar (saccharose), preferably refined sugar, in specific quantities during the process of calcic bentonite activation by means of incorporation of sodium carbonate into the in natura ore, belonging to the field of chemical industry for use in the composition of green sand for cast molding, offering a wide range of advantages in comparison with the existing formulas.Type: GrantFiled: October 19, 2007Date of Patent: December 27, 2011Assignee: Coque do Sul do Brasil LtdaInventor: Arnaldo Romanus
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Publication number: 20110139310Abstract: Disclosed is a foundry mix containing a sulfate and/or nitrate salt and its use to make foundry shapes by the warm-box, hot-box, no-bake, and cold-box process, the use of these foundry shapes to make metal castings, and the metal castings prepared by the process.Type: ApplicationFiled: September 1, 2010Publication date: June 16, 2011Inventors: Ralph E. Showman, Sean B. Harmon
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Publication number: 20110139309Abstract: Disclosed is a foundry mix containing a carbonate salt and its use to make foundry shapes by the warm-box, hot-box, no-bake, and cold-box process, the use of these foundry shapes to make metal castings, and the metal castings prepared by the process.Type: ApplicationFiled: September 1, 2010Publication date: June 16, 2011Inventors: Ralph E. Showman, Sean B. Harmon
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Publication number: 20110100255Abstract: The present invention features a core material mixture for casting that prevents strength from being decreased and improves de-coring properties. The core material mixture preferably includes molding sand, and a core binder consisting of sodium silicate-based binder and an oxide film inhibitor. The present invention also provides a method of fabricating a core for a casting and a core for the casting fabricated by the same method.Type: ApplicationFiled: April 5, 2010Publication date: May 5, 2011Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, YOUNG IL CHEMICAL CO., LTD.Inventors: Han Jae Kim, Soo-Hyun Huh
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Publication number: 20100294167Abstract: Composition and process of a composition of additivated sodic bentonite through the addition of dextrin and sugar (saccharose), preferably refined sugar, or starch and sugar (saccharose), preferably refined sugar, in specific quantities during the process of calcic bentonite activation by means of incorporation of sodium carbonate into the in natura ore, belonging to the field of chemical industry for use in the composition of green sand for cast molding, offering a wide range of advantages in comparison with the existing formulas.Type: ApplicationFiled: October 19, 2007Publication date: November 25, 2010Inventor: Arnaldo Romanus
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Patent number: 7767014Abstract: A mold material castable to provide a mass reduced work piece machinable to produced a mold and methods of utilizing such mold material to cast mass reduced work pieces machinable to produce a mold.Type: GrantFiled: October 16, 2007Date of Patent: August 3, 2010Assignee: EBS Concepts, LLCInventor: Eric B. Strauss
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Patent number: 7541418Abstract: A transparent antimicrobial thermoplastic molding composition is disclosed. The composition contains aromatic polycarbonate resin and 0.01 to 3.8 of an antimicrobial compound conforming to formula (I) AgaM1bM22(PO4)3??(I) wherein M1 is at least one ion selected from the group consisting of alkali metal ion, alkaline earth metal ion, ammonium ion and hydrogen ion, M2 a tetravalent metal selected from the group consisting of Ti, Zr and Sn, and where a and b are positive numbers where a+mb=1 where m is a valence of M1, the percent being relative to the weight of the polycarbonate. The composition is suitable for molding articles having good appearance and surface qualities.Type: GrantFiled: December 27, 2005Date of Patent: June 2, 2009Assignee: Bayer MaterialScience LLCInventors: Michael A. Gerace, James P. Mason, John J. Charles
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Publication number: 20090108478Abstract: A mold assembly for the manufacture of at least one ophthalmic device used in or on the eye is disclosed. The mold assembly includes a mateable pair of mold parts wherein at least one of the mold parts comprises at least an oxygen-absorbing mold material and an oxygen scavenger composition containing (i) an oxygen scavenging polymer comprising a polymer backbone and one or more substituted or unsubstituted cyclic olefinic groups covalently linked to the polymer backbone; and (ii) an oxygen scavenging catalytic amount of a transition metal catalyst.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Applicant: Bausch & Lomb IncorporatedInventors: Bruce E. Lawton, Stephen P. Johnston, Edward A. Vaquero, Sanjay Rastogi
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Patent number: 7500511Abstract: A slurry composition for a mold and method of use thereof. The slurry composition includes about 45-80% by weight alumina, about 10-30% by weight silicon carbide, and about 10-50% by weight colloidal silica. In one aspect, the alumina component comprises a material selected from the group consisting of brown fused alumina, white fused alumina, tabular alumina, calcined alumina, and mixtures thereof. In another aspect, the composition includes fumed silica at 2-5% by weight. The composition may also include a setting agent at 0.05-2% by weight.Type: GrantFiled: September 24, 2003Date of Patent: March 10, 2009Assignee: Magneco/Metrel, Inc.Inventors: George Connors, Shirish Shah
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Patent number: 7022178Abstract: A binding agent system based on water glass is disclosed, comprising an aqueous alkali silicate solution having the general composition: xSiO2·yM2O ·zH2O, with M standing for the alkali ions Li+, K+, or Na+, and a hygroscopic base, which is added in the ratio 1:4 to 1:6, with the modulus Na2O/SiO2 being equal to 2.5 to 3.5 at a proportion of solids of 20 to 40% and with 30% sodium hydroxide in an aqueous solution being used as the hygroscopic base. According to the present invention, the aqueous alkali silicate solution contains an emulsion solution having 8 to 10% silicone oil in relation to the quantity of binder, with the silicone oil having a boiling point?250°. The quantity of binder for a core sand mixture is 1.0 to 2.5%, in relation to the total quantity of granular solid, with the production method being performed in a core shooter comprising a vertically positioned housing having a horizontal air intake. The core sand mixture is introduced via a funnel into a slotted sand cylinder.Type: GrantFiled: October 21, 2000Date of Patent: April 4, 2006Assignee: Hydro Aluminium Deutschland GmbHInventor: Thomas Steinhäuser
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Patent number: 6881258Abstract: The present invention refers to a mixture comprising alpha CaSO4×½ H2O, CaSO4×2 H2O, a combination of a hardening accelerator, a hardening retarder and a setting expansion inhibitor, and optionally a surfactant. The mixture can be used to prepare a die having an extremely high setting expansion.Type: GrantFiled: April 21, 2003Date of Patent: April 19, 2005Assignee: GC Europe N.V.Inventors: Paul Delee, Haruhiko Horiuchi
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Patent number: 6866803Abstract: A slip casting mold includes a water absorption layer having self water absorption capability and substantial water resistance. With the water saturation percentage of the water absorption layer being controlled, a slurry layer is deposited in the slip casting mold mainly under capillary attractive forces of the slip casting mold. The water absorption layer comprises an open porous body which is manufactured by stirring a mixture of an epoxy compound having at least one epoxy ring in one molecule, a hardener for reacting with the epoxy compound to harden the epoxy compound, a filler for developing self water absorption capability and mold releasability, and water into an O/W-type emulsion slurry, and casting the emulsion slurry into a mold impermeable to water, hardening the emulsion slurry in the mold while containing water.Type: GrantFiled: July 10, 2000Date of Patent: March 15, 2005Assignee: Toto Ltd.Inventors: Akio Matsumoto, Takeshi Sato, Yoshifumi Misumi, Akira Hirayama, Katsuhiro Hasebe, Yoshinori Yamashita
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Patent number: 6784397Abstract: The present invention is directed to a release composition for molds and formers used in the production of natural and synthetic latex articles. The release coating contains a water-borne, high Tg polymer formed from at least one hydrophobic monomer and at least one hydrophilic monomer, where the Tg of the polymer is at least −10° C. One advantage of the release composition is that it is compatible with a coagulant solution used in the formation of latex gloves. Articles formed using the release coating have good anti-blocking properties.Type: GrantFiled: June 15, 2001Date of Patent: August 31, 2004Assignee: National Starch and Chemical Investment Holding CorporationInventors: Zhixin Li, Joseph B. Gardner, Chaodong Xiao, John S. Thomaides, Yasuo Tokimori, Stanislaw Petrash, Christopher G. Gore
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Patent number: 6699314Abstract: A mold releasing agent suitable for easily casting a cylindrical cast member which is superior in adhesion on cast parts at low cost, is provided. A mold releasing agent for a centrifugal casting mold comprises a binder, a heat insulating agent, and a foaming component having a foaming property, is dissolved in a solvent so as to form a slurry having a specific viscosity, and a mold releasing agent layer having crater shaped concave portions is formed by coating on the inside of an integral centrifugal casting mold.Type: GrantFiled: February 21, 2002Date of Patent: March 2, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Arai Takeo, Murakami Manabu, Yokoyama Kouriki, Nakaya Shoichi, Miyanishi Masahiro, Suzuki Sadahiro
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Patent number: 6514446Abstract: This invention provides improved methods and compositions for achieving material coloration using particle scattering. These coloration effects can be designed to be either highly stable or dependent upon the switching effects of either temperature, integrated thermal exposure, moisture absorption, or exposure to actinic radiation. Articles employing materials with these coloration effects are described. Composition comprise a solid, light-transmitting matrix component having a non-liquid particle scattering colorant dispersed. Articles are produced wherein another solid second matrix component has an electronic transition colorant dispersed therein and the first and second compositions are disposed on one another and optionally interpenetrate each other. Colored articles are produced in the form of fibers, films and molded articles.Type: GrantFiled: November 22, 2000Date of Patent: February 4, 2003Assignee: AlliedSignal Inc.Inventors: Tammy Lynn Smith, Ray Baughman, Mary Frances Martin, Wonsik Choi, Jeffrey Moulton
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Patent number: 6495084Abstract: Dispersions of waxes in water are now widely used as molding aids, mold release agents, and the like but often leave troublesome residues that can not be easily washed away with water. This problem can be avoided by use instead of a solution in water of certain organic materials, preferably a combination of glycerine and an alkyl imidazoline surfactant.Type: GrantFiled: May 10, 2000Date of Patent: December 17, 2002Assignee: Henkel CorporationInventors: Theodore D Held, III, Douglas J Lasky
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Patent number: 6248284Abstract: The invention relates to a process for preparing free flowing particles covered with a layer of water glass, comprising the steps of: (a) providing a mixture containing particles to be covered, water and 0.1-5% by weight water glass, calculated on the basis of the weight of the particles, the water glass being dissolved in said mixture, and (b) stirring the mixture mechanically, optionally by supplying heat from an external heat source, and permitting the water to evaporate from the mixture until at least so much water is evaporated that said mixture is no longer sticky. Furthermore, the invention relates to a process for preparing an article with a detailed surface.Type: GrantFiled: June 18, 1999Date of Patent: June 19, 2001Assignee: DTI IndustriInventor: Ole Huusmann
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Patent number: 6218461Abstract: A silicone composition curing at room temperature by condensation, which is suitable especially as a dental molding composition. The silicone composition consists of the a) base paste containing a filler and polyorganosiloxane having hydroxy groups, b) and the activator component containing in addition to crosslinking agent and catalyst also a polyaddition product with alkoxysilyl groups in the molecule. The base paste and activator component can be mixed uniformly together and can be offered with special advantage in double cartridges.Type: GrantFiled: February 23, 1999Date of Patent: April 17, 2001Assignee: Heraeus Kulzer GmbH & Co. KGInventors: Peter Schwabe, Michael Freckmann, Klaus-Dieter Nehren