Patents Represented by Attorney Bart G. Newland
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Patent number: 4896250Abstract: Novel solvent processible electrically conductive coatings of conductive particle (e.g. silver) filled polysulfones. The coating compositions are useful in a variety of environments, especially in the manufacture of tantalum capacitors. The coatings advantageously are extremely heat stable to withstand high temperature soldering and attach to solder without thermal decomposition.Type: GrantFiled: February 12, 1988Date of Patent: January 23, 1990Assignee: Emerson & Cuming, Inc.Inventor: Mary Sullivan
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Patent number: 4871552Abstract: Substituted hydantoin analogues of essential amino acids are used as nutritive supplements in animal feed compositions.Type: GrantFiled: March 29, 1988Date of Patent: October 3, 1989Assignee: W. R. Grace & Co.-Conn.Inventors: Robert W. Bragdon, Roger R. Gaudette
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Patent number: 4832851Abstract: A filtration apparatus and method is disclosed, the apparatus including a container tube for holding a sample to be filtered and a filtering vessel inserted therein. The filtering vessel carries a filter over its lower end and includes a chamber portion for receiving the filtrate. The method includes forcibly immersing the filtration vessel into the container tube, limiting the relative axial position therebetween, and subjecting the apparatus to centrifugation. The apparatus and method is useful for filtering dilute, concentrated and particle-laden samples.Type: GrantFiled: February 2, 1987Date of Patent: May 23, 1989Assignee: W. R. Grace & Co.Inventors: William F. Bowers, Douglas B. Tiffany
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Patent number: 4801008Abstract: Disclosed is a disposable cartridge including a chamber containing a plurality of inter-reacting components of, e.g., an adhesive system. The components are separated from each other by a barrier film formed by reaction therebetween. The components are expelled through a nozzle housing a static mixing element, the nozzle being adapted to trap the barrier film to prevent clogging. The nozzle includes a frusto-conical entry portion designed to ensure a constant mix-ratio profile between the components.Type: GrantFiled: June 24, 1988Date of Patent: January 31, 1989Assignee: W. R. Grace & Co.Inventor: Thomas R. Rich
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Patent number: 4797209Abstract: An adjustable distribution cell apparatus is disclosed, the apparatus including first and second independently-operable seals for preventing the leakage of eluant beyond the distribution cell. The inventive apparatus is useful in combination with a chromatographic column having viewing windows therein.Type: GrantFiled: December 1, 1987Date of Patent: January 10, 1989Assignee: Amicon Wright Ltd.Inventor: Derek H. A. Jackson
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Patent number: 4783296Abstract: A process for producing polyurethane foam articles is described, in which the article is produced in the conventional manner by foaming in a mould and a release agent is applied to the mould surface prior to filling with the foam-producing components. According to the invention, a solvent-free, aqueous release agent is used in combination with one or more alkali metal and/or ammonium salts of higher fatty acids and one or more higher alcohols and the combination is applied in the hot state, preferably at a temperature of at least 75.degree. C. to the mould surface. In addition, an additive is described, which is suitable for performing the process according to the invention and contains one or more alkali metal and/or ammonium salts of higher fatty acids, one or more higher alcohols and otherwise water.Type: GrantFiled: November 6, 1986Date of Patent: November 8, 1988Assignee: Teroson GmbHInventors: Wolfgang Fischer, Thomas Hattich, William Krug, Gerhard Schuster
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Patent number: 4770827Abstract: A process for producing molded articles, especially molded polyurethane foam articles, wherein the mold is treated with an aqueous release agent or a concentrate of one or more release-active substances in organic solvent. The release agent is preheated, e.g. by an atomizer supplied with hot pressurized air, prior to being applied to the mold. The process enables the efficient use of water-base release agents and thus reduces the emission of harmful organic solvents into the atmosphere.Type: GrantFiled: January 17, 1986Date of Patent: September 13, 1988Assignee: Teroson GmbHInventor: Wolfgang Fischer
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Patent number: 4744990Abstract: Substituted hydantoin analogues of essential amino acids are used as nutritive supplements in animal feed compositions.Type: GrantFiled: September 25, 1986Date of Patent: May 17, 1988Assignee: W. R. Grace & Co.Inventors: Robert W. Bragdon, Roger R. Gaudette
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Patent number: 4743415Abstract: A process for sealing railroad structures in which the ballast is cleared from the track, the ties are placed on blocks 3, prefabricated concrete elements 6 then being placed under each block, concrete is then poured into the spaces 7 between the prefabricated elements and finally after hardening the tracks are again lowered onto the railroad structure. This relatively simple process sequence includes the use of a synthetic concrete, preferably a synthetic microconcrete, which ensures that due to an extremely intimate connection between the prefabricated elements and the concrete in the spaces between these elements a monolithic layer is obtained.Type: GrantFiled: March 19, 1987Date of Patent: May 10, 1988Assignee: Syncrete S. A.Inventor: Pierre A. Crouzet
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Patent number: 4741490Abstract: A mandrel for use in winding a web around an article, the mandrel including a support for a roll of the web, a handle rotatably attached at each end of the support and a brake which retards rotation of the support relative to at least one handle by an amount depending on the relative rotation between the handle and support which has already taken place.Type: GrantFiled: October 14, 1987Date of Patent: May 3, 1988Assignee: W. R. Grace Ltd.Inventor: John R. Evans
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Patent number: 4711401Abstract: Hydraulic cements such as Portland cement are interground with diesters formed by reacting a polyol (e.g. alkylene glycol) with a monobasic carboxylic acid (e.g. acetic acid) to enhance the efficiency of the grinding operation.Type: GrantFiled: January 16, 1987Date of Patent: December 8, 1987Assignee: W. R. Grace & Co.Inventor: Frank G. Serafin
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Patent number: 4643362Abstract: Hydraulic cements such as Portland cement are interground with diesters formed by reacting a polyol (e.g. alkylene glycol) with a monobasic carboxylic acid (e.g. acetic acid) to enhance the efficiency of the grinding operation.Type: GrantFiled: December 2, 1985Date of Patent: February 17, 1987Assignee: W. R. Grace & Co.Inventor: Frank G. Serafin
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Patent number: 4609511Abstract: A release agent is described, which is suitable for the production of polyurethane foam articles in molds. It is an aqueous emulsion or dispersion of per se known release-effective substances as well as optionally conventional additives, having a water content of at least 60% by weight and preferably 85 to 96% by weight, the water being masked through the effect of lyotropic mesomorphism. Masking and immobilizing the water molecules avoids that the water molecules have a prejudicial effect of the polyol/isocyanate reaction, and is preferably achieved by the combined use of release-effective substances and suitable masking aids. As suitable masking aids especially fatty alcohol polyglycol ethers and ethoxylated fatty alcohols are proposed. The polyurethane articles obtained while using the above described release agent fulfil the standard quality requirements without any of the disadvantageous effects on the environment such as occur with conventional release agents.Type: GrantFiled: January 15, 1986Date of Patent: September 2, 1986Assignee: W. R. Grace & Co.Inventors: Wolfgang Fischer, William Krug
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Patent number: H493Abstract: Alkylsulfonated polysaccharides, methods of making them and use of said polysaccharides for improving the flowability of mortar and concrete mixes are disclosed.Type: GrantFiled: February 1, 1984Date of Patent: July 5, 1988Assignee: Grace Italiana S.p.A.Inventors: Fabio Tegiacchi, Benito Casu