Patents Assigned to Supelco
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Patent number: 5653875Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: July 29, 1994Date of Patent: August 5, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5630937Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: June 7, 1995Date of Patent: May 20, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5620603Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: June 7, 1995Date of Patent: April 15, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5609756Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: June 7, 1995Date of Patent: March 11, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5607580Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: June 7, 1995Date of Patent: March 4, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5599445Abstract: A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to silicon bonds. This composition may be used to bond carbon particles through a medium comprising the siloxane polymer to a vitreous, metal, plastic or other nucleophilic substrate. Alternatively, the bodies may comprise alumina, silicon, zeolite, organic polymers or other nucleophilic compositions, which are bonded directly to silicon atoms of the siloxane polymer. To bond carbon or other nucleophilic bodies to the substrate, the substrate is contacted with a mixture of the bodies and a hydrosiloxane polymer. The mixture is heated to cause the polymer to be bonded to the nucleophilic bodies, typically by C--Si, C--O--Si, Si--O--Si or Si--O--Al bonds, and to the substrate by reaction with the surface silanol or other nucleophilic groups.Type: GrantFiled: June 7, 1995Date of Patent: February 4, 1997Assignee: Supelco, Inc.Inventors: William R. Betz, James L. Desorcie
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Patent number: 5552324Abstract: A reagent, an apparatus and a method for semi-quantitatively estimating the concentration of readily oxidizable organic vapors in a gas sample, as for example ethanol in a human breath sample, is disclosed. The ethanol-sensitive solid indicator is a solid support which contains a permanganate salt and is wetted by a strongly acidic or alkaline solution. In the presence of ethanol the indicator produces a clearly visible color change. The apparatus contains the indicator and provides a pathway for a gas sample through the indicator. The method allows estimation of the organic-vapor content of a gas sample by comparing the volume of indicator which changes color in response to the gas sample with the volume which changes color in response to a known-concentration standard.Type: GrantFiled: May 23, 1994Date of Patent: September 3, 1996Assignee: Supelco, Inc.Inventor: Francis P. Liu
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Patent number: 5338454Abstract: Chromatographic separations and resolutions of racemic mixtures and diastereoisomers are enhanced by simultaneously employing an enantiomeric, chiral stationary phase (CSP) and an enantiomeric, chiral mobile phase additive (CMPA) bearing a stereoisomeric relationship to the CSP but having the opposite chirality are enhanced relative to the use of either a CSP or a CMPA alone. Specific CMPA compositions having the structural formulas ##STR1## are also disclosed.Type: GrantFiled: August 27, 1992Date of Patent: August 16, 1994Assignee: Supelco, IncorporatedInventor: Keith J. Duff
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Patent number: 5192406Abstract: The walls of fused-silica capillary columns used for capillary zone electrophoresis and micellar electrokinetic capillary chromatography may be deactivated with polysiloxanes, polysilazanes and other silicone polymers to permit more effective separations without eliminating electro-osmotic flow within the columns.Type: GrantFiled: January 9, 1991Date of Patent: March 9, 1993Assignee: SupelcoInventor: Cole L. Woolley
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Patent number: 5137627Abstract: Silica gel chromatographic supports surface-modified with (R.sup.1 O).sub.3-m Si R.sup.2.sub.m(CH.sub.2).sub.3 NH(CH.sub.2 CH.sub.2 NH).sub.n H, in which R.sup.1 is a C.sub.1 -C.sub.5 alkyl, R.sup.2 is methyl or ethyl, and m and n are independently selected from the integers 0, 1 or 2, and further modified chemically to produce reverse-phase character, markedly reduce the interaction between silanophilic analytes and the silanol groups present on the surface of the silica gel through the presence of polar groups, which include the residual unmodified amino and modified amino groups, and which are densely packed near the silica surface. This results in chromatographic elution of basic, silanophilic analytes in efficient, narrow bands similar to those of the less-polar analytes.Type: GrantFiled: May 10, 1990Date of Patent: August 11, 1992Assignee: Supelco, Inc.Inventor: Binyamin Feibush
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Patent number: 5047438Abstract: Porous, rigid resin particles are prepared having a predetermined particle size distribution, surface area and porosity by polymerizing in the pores of porous inorganic template particles a reaction mixture comprising monovinyl monomers, polyvinyl crosslinking monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles. The extracted mixture is polymerized in the pores of the template particles, and the template particles are removed without destruction of the polymerizate. The isolated polymerizate mirrors the characteristics of the template particles. The surface of the polymerizate may be modified in various ways to contain desired functionality. The particles of the invention are useful in chromatography, adsorption, ion exchange, and in catalysis.Type: GrantFiled: September 26, 1988Date of Patent: September 10, 1991Assignee: Supelco, Inc.Inventors: Binyamin Feibush, Nai-Hong Li
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Patent number: 4933372Abstract: Porous, rigid resin particles are prepared having a predetermined particle size distribution, surface area and porosity by polymerizing in the pores of porous inorganic template particles a reaction mixture comprising monovinyl monomers, polyvinyl crosslinking monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles. The extracted mixture is polymerized in the pores of the template particles, and the template particles are removed without destruction of the polymerizate. The isolated polymerizate mirrors the characteristics of the template particles. The surface of the polymerizate may be modified in various ways to contain desired functionality. The particles of the invention are useful in chromatography, adsorption, ion exchange, and in catalysis.Type: GrantFiled: November 7, 1989Date of Patent: June 12, 1990Assignee: Supelco, Inc.Inventors: Binyamin Feibush, Nai-Hong Li
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Patent number: 4529230Abstract: A connector for the joining together two fused silica or glass or other types of capillary tubes, in a chromatography system, without detrimental chromatographic effects created by distortion of the two joined capillary tubes, dead volumes or exposure to metal surfaces, or for the butt joining of glass rods, has a pliable elongate surrounding member which sealingly engages a substantial length of each tube or rod from its end as well as supports each and thereby eliminates exposure to a housing or container surface.Type: GrantFiled: February 26, 1982Date of Patent: July 16, 1985Assignee: Supelco, Inc.Inventor: William F. Fatula, Jr.
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Patent number: D289861Type: GrantFiled: April 28, 1986Date of Patent: May 19, 1987Assignee: Supelco, Inc.Inventors: George D. Wachob, Robert W. Rightnour
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Patent number: D312691Type: GrantFiled: December 16, 1987Date of Patent: December 4, 1990Assignee: Supelco, Inc.Inventor: Paul S. Spock
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Patent number: D312875Type: GrantFiled: December 16, 1987Date of Patent: December 11, 1990Assignee: Supelco IncorporatedInventor: Paul S. Spock
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Patent number: D312876Type: GrantFiled: December 16, 1987Date of Patent: December 11, 1990Assignee: Supelco Inc.Inventor: Paul S. Spock
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Patent number: D316897Type: GrantFiled: April 14, 1987Date of Patent: May 14, 1991Assignee: Supelco, Inc.Inventors: Barry L. Burger, John F. McDevitt
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Patent number: D319879Type: GrantFiled: December 16, 1987Date of Patent: September 10, 1991Assignee: Supelco, Inc.Inventors: George D. Wachob, Brian R. Lowery