Patents Assigned to Kerr
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Patent number: 7645443Abstract: One-part and two-part compositions curable by a metathesis reaction comprising a resin containing a polyether-based substrate with at least two cycloolefin groups per molecule curable by a metathesis reaction with a metathesis catalyst. These compositions may optionally contain a reaction control agent for slowing the progress of the metathesis reaction. The metathesis catalyst can be a ruthenium carbene complex catalyst. The substrate may be, for example, a difunctional urethane polyester or polyether carboxylate containing norbornenyl end groups.Type: GrantFiled: February 21, 2006Date of Patent: January 12, 2010Assignee: Kerr CorporationInventor: Christos Angeletakis
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Patent number: 7645050Abstract: A user-wearable illumination assembly comprises a mounting fixture that is adapted to be coupled to a user-wearable device, such as eyeglasses, goggles, face masks, helmets, or other devices. A light guide has a first end that can be coupled to a light source, and a second end coupled to a lens housing that is in turn coupled to the mounting fixture. An optical lens in the lens housing cooperates with the light guide to project light from the light source through the lens. In one embodiment, the lens has a substantially spherical surface facing the second end of the light guide and an aspheric surface facing away from the second end of the light guide. In another embodiment, the mounting fixture comprises articulating portions to permit independent or simultaneous adjustment of the lens housing to direct projected light in a desired direction.Type: GrantFiled: November 21, 2006Date of Patent: January 12, 2010Assignee: Kerr CorporationInventors: Brian L. Wilt, Patrick Shipley, Frederick N. Bushroe, Kevin Garcia
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Patent number: 7625551Abstract: Two-part dental impression material curable by a metathesis reaction comprising a base paste with first and second resin components each containing at least two cycloolefin groups per molecule curable by a metathesis reaction with a metathesis catalyst. The first resin includes a urethane polyether or polyester carboxylate backbone terminated with the cycloolefin groups and the second resin includes an alkoxy-siloxane polyether or polyester carboxylate backbone terminated with the cycloolefin groups. The metathesis catalyst can be a ruthenium carbene complex catalyst.Type: GrantFiled: February 21, 2006Date of Patent: December 1, 2009Assignee: Kerr CorporationInventor: Christos Angeletakis
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Patent number: 7625991Abstract: A resin that may be used, for example, in dental impression materials, and a method of making the resin. The resin comprises an alkoxy-siloxane polyester or polyether carboxylate backbone functionalized with at least two cycloolefin groups capable of undergoing a metathesis reaction. The method of making the resin comprises reacting a hydride terminated siloxane with a polyether or polyester diol containing propylene oxide and ethylene oxide fragments, and a cycloolefinic group functionalized hydroxyalkyl carboxylic acid ester, in the presence of a Group 3 or 13 catalyst.Type: GrantFiled: February 21, 2007Date of Patent: December 1, 2009Assignee: Kerr CorporationInventors: Christos Angeletakis, Matthias Stender
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Publication number: 20090176194Abstract: A simplified method for adhering a prosthetic device to tooth structure using a single-part light-curable self-adhering cement composition. The method includes adhering a bonding surface of the prosthetic device to tooth structure directly using a light-curable single-part self-adhering cement composition without first treating the tooth structure and the bonding surface of the prosthetic device with a primer/adhesive, and photo-curing the cement composition. The light-curable single-part self-adhering cement composition comprises: (i) at least one acidic polymerizable monomer having at least one acidic moiety and at least one ethylenically unsaturated group, (ii) at least one non-acidic polymerizable monomer having at least one ethylenically unsaturated group, (iii) at least one photo-initiator, and (iv) at least one filler. The weight ratio of component (i) to component (ii) ranges from about 0.5:99.5 to about 70:30.Type: ApplicationFiled: January 7, 2008Publication date: July 9, 2009Applicant: KERR CORPORATIONInventor: Xuejun Qian
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Publication number: 20090093563Abstract: A dental adhesive composition comprising (i) at least one non-acidic polymerizable monomer having at least one ethylenically unsaturated group, (ii) optionally one or more acidic compounds, (iii) at least one photoinitiator, (iv) at least one solvent, and (v) about 0-40% by weight of one or more fillers; wherein the weight ratio of non-acidic polymerizable monomers/acidic compounds in the adhesive composition is more than about 4.5; the viscosity of the adhesive composition is less than about 350 centipoise (cP) at 25° C.; and the adhesive composition excluding solvent and filler has an acid number of less than about 0.75 mmol NaOH/g. The dental adhesive composition is used with a dental primer composition, which may be provided together in a kit.Type: ApplicationFiled: October 8, 2007Publication date: April 9, 2009Applicant: KERR CORPORATIONInventor: Xuejun Qian
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Patent number: 7498367Abstract: A dental composition compatible with acidic dental primers/adhesives, the dental composition comprising (A) 5% (w/w) to 90% (w/w) of at least one polymerizable monomer having at least one ethylenically unsaturated vinyl, acrylate, or methacrylate group; (B) 0.01% (w/w) to 10% (w/w) of at least one compound of structure where each of R1, R2, and R3 may be the same or different and is independently selected from H, alkyl, alkoxyl, aryl, acyl, allyl, pyridyl, —OH, alkenyl, aralkyl, cycloalkyl, and heterocyclic structure containing O, S, or N; (C) 0.01% (w/w) to 10% (w/w) of at least one hydroperoxide compound with at least one hydroperoxide groups attached to a tertiary carbon; (D) 5% (w/w) to 95% (w/w) of at least one finely divided filler; (E) 0% (w/w) to 25% (w/w) of one or more components selected from a solvent, a photoinitiator, a stabilizer, and/or an antimicrobial agent.Type: GrantFiled: February 21, 2005Date of Patent: March 3, 2009Assignee: Kerr CorporationInventor: Xuejun Qian
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Patent number: 7490866Abstract: An anchoring device for a pipe coupling including an annular channel of generally U-shaped cross-section. The channel has a web portion with flanges and projecting radially inwardly. A frusto-conical gripping ring is located in the channel with its outer edge inside the web portion adjacent one of the flanges and its inner edge adjacent the other flange and projecting inwardly beyond this latter flange. The annular channel forms an incomplete ring and is compressible circumferentially. The anchoring device is fitted inside a clamping device, which fits around a pipe coupling. The clamping device has a tensioning for tightening the clamping device around the pipe, compressing the annular channel and causing the inner edge of the frusto-conical gripping ring to engage the outer surface of the pipe and thus grip the pipe.Type: GrantFiled: February 20, 2003Date of Patent: February 17, 2009Assignee: Taylor Kerr (Couplings) LimitedInventors: Ian Richard Webb, Neil John Taylor
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Publication number: 20090042170Abstract: A method for temporarily widening a gingival sulcus. A composition comprising a polymerizable monomer having at least one ethylenically unsaturated group, a photo polymerization initiator, and a fine inorganic powder is inserted within a gingival sulcus to be widened, and the composition is thereafter irradiated in situ to polymerize the composition. The result is a rubbery material that is easily removable from the widened sulcus.Type: ApplicationFiled: August 7, 2007Publication date: February 12, 2009Applicant: KERR CORPORATIONInventors: Xiangxu Chen, Xuejun Qian
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Publication number: 20080220050Abstract: At least one clay, at least one glass filler, and at least one astringent agent are formulated with water into a paste for injection in dental and medical applications. In one embodiment, the paste is used to treat and/or widen a gingival sulcus. The paste is readily rinsed off the surface to which it is applied using water.Type: ApplicationFiled: March 8, 2007Publication date: September 11, 2008Applicant: KERR CORPORATIONInventors: Xiangxu Chen, Xuejun Qian
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Patent number: 7396053Abstract: A pipe coupling (11) comprises a tubular casing (12) and a sealing gasket (13), which fit over the ends of the pipes to be coupled. The casing (12) is formed from a strip of rolled steel into a cylindrical shape, with a longitudinal gap (14). The free ends of the strip, which forms the casing, are bent outwardly to form radially projecting flange (15) along opposite edges of the longitudinal gap (14). The outer ends of the flanges (15) are bent back at right angles to form stiffening flanges (16) along the longitudinal outer edges of the flanges (15). A bridging member (18) fits inside the casing so as to span the longitudinal gap. Tensioning screw bolts (25) pass through reinforcing plate's (20) and the flange (15). A hexagonal nut (34) is threaded onto the end of each screw bolt. The nuts fit into the channel but are prevented from turning. The heads (35) of the bolts have a hexagonal recess to take an Allen key so that they can be tightened to clamp the coupling around the pipe ends.Type: GrantFiled: June 9, 2003Date of Patent: July 8, 2008Assignee: Taylor Kerr (Couplings) LimitedInventors: Ian Richard Webb, Neil John Thornton Taylor
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Patent number: 7351753Abstract: A method of using a shelf-stable two-part self-adhering dental composition that comprises (a) at least one acidic compound containing at least one acidic moiety selected from the group consisting of where R is an alkyl or aryl group; (b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group; (c) a substituted thiourea selected from the group consisting of 1-(2-pyridyl)-2-thiourea and 1-(2-tetrahydrofurfuryl)-2-thiourea; and (d) a hydroperoxide compound with at least one hydroperoxide group attached to a tertiary carbon. The first and second parts are then mixed immediately prior to application, applied to a dental substrate, and hardened. The bond strength of the mixed composition to dentine substrate is at least 3 MPa. The composition has excellent shelf-life and is self-adhering to various dental substrates such as a tooth, metal alloy and porcelain.Type: GrantFiled: December 18, 2006Date of Patent: April 1, 2008Assignee: Kerr CorporationInventor: Xuejun Qian
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Publication number: 20070203257Abstract: A method for providing a dental composition comprising providing a paste/paste two-part self-adhering dental composition comprising (a) at least one acidic compound containing at least one acidic moiety selected from the group consisting of where R is an alkyl or aryl group; (b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group; (c) at least one finely divided filler; (d) a reducing agent; and (e) an oxidizing agent; and providing instructions for mixing the two pastes immediately prior to application where the ratio of a first paste containing (a) or a higher concentration of (a) to a second paste not containing (a) or containing a lower concentration of (a) is greater than 1:1 (by volume). The method also includes mixing the two pastes and applying the mixed composition to a dental substrate.Type: ApplicationFiled: March 29, 2007Publication date: August 30, 2007Applicant: Kerr CorporationInventor: Xuejun Qian
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Publication number: 20070197741Abstract: A resin that may be used, for example, in dental impression materials, and a method of making the resin. The resin comprises an alkoxy-siloxane polyester or polyether carboxylate backbone functionalized with at least two cycloolefin groups capable of undergoing a metathesis reaction. The method of making the resin comprises reacting a hydride terminated siloxane with a polyether or polyester diol containing propylene oxide and ethylene oxide fragments, and a cycloolefinic group functionalized hydroxyalkyl carboxylic acid ester, in the presence of a Group 3 or 13 catalyst.Type: ApplicationFiled: February 21, 2007Publication date: August 23, 2007Applicant: KERR CORPORATIONInventors: Christos Angeletakis, Matthias Stender
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Patent number: 7214726Abstract: A method for providing a dental composition comprising providing a paste/paste two-part self-adhering dental composition comprising (a) at least one acidic compound containing at least one acidic moiety selected from the group consisting of where R is an alkyl or aryl group; (b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group; (c) at least one finely divided filler; (d) a reducing agent; and (e) an oxidizing agent; and providing instructions for mixing the two pastes immediately prior to application where the ratio of a first paste containing (a) or a higher concentration of (a) to a second paste not containing (a) or containing a lower concentration of (a) is greater than 1:1 (by volume). The method also includes mixing the two pastes and applying the mixed composition to a dental substrate.Type: GrantFiled: July 17, 2003Date of Patent: May 8, 2007Assignee: Kerr CorporationInventor: Xuejun Qian
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Patent number: 7210930Abstract: A hand held dental instrument for curing light-curable compounds comprises a housing and an array of solid state, light emitting junctions or dies for generating light having wavelengths within a narrow band of wavelengths (e.g. 400–500 nm). Preferably, a peak wavelength of 470 nm is generated. The device further comprises an optical fiber light pipe for capturing the light and transmitting a beam of the light to a work surface containing a light-curable compound. An optical lens or lenses may be used for focusing the light into the light pipe.Type: GrantFiled: September 5, 2003Date of Patent: May 1, 2007Assignee: Kerr CorporationInventors: Jozef Kovac, Raymond Knox
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Publication number: 20070088097Abstract: A method of using a shelf-stable two-part self-adhering dental composition that comprises (a) at least one acidic compound containing at least one acidic moiety selected from the group consisting of where R is an alkyl or aryl group; (b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group; (c) a substituted thiourea selected from the group consisting of 1-(2-pyridyl)-2-thiourea and 1-(2-tetrahydrofurfuryl)-2-thiourea; and (d) a hydroperoxide compound with at least one hydroperoxide group attached to a tertiary carbon. The first and second parts are then mixed immediately prior to application, applied to a dental substrate, and hardened. The bond strength of the mixed composition to dentine substrate is at least 3 MPa. The composition has excellent shelf-life and is self-adhering to various dental substrates such as a tooth, metal alloy and porcelain.Type: ApplicationFiled: December 18, 2006Publication date: April 19, 2007Applicant: KERR CORPORATIONInventor: Xuejun Qian
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Patent number: 7182597Abstract: The present invention provides a handheld portable, efficient instrument for curing light-curable compounds. The instrument comprises a housing, a light emitted structure supported in the housing, and a reflector configured to interface with the light emitting structure such that light emitted is captured and directed by the reflector onto a light-curable compound. The reflector maximizes the amount of light transferred and contacting the light-curable compound thereby reducing the instrument's power requirements and improving efficiency. The light emitting structure comprises state of the art, energy efficient, light generating dies. The curing light instrument may also have a self-contained power supply lending portability and convenient of use.Type: GrantFiled: August 8, 2002Date of Patent: February 27, 2007Assignee: Kerr CorporationInventors: Owen Gill, John Klinger, Alex Lippay
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Publication number: 20070039522Abstract: The invention relates to a reducing agent for the soluble chromate content of cement and to methods for the production thereof, which comprise concentrating an used sulfuric acid, containing iron(II) sulfate, and separating the sulfuric acid from the obtained precipitate which contains iron(II) sulfate.Type: ApplicationFiled: July 16, 2004Publication date: February 22, 2007Applicant: Kerr-McGee Pigments GmbHInventors: Michael Vossing, Gerhard Auer, Benno Laubach, Detlef Klein, Werner Schuy, Klaus Kollisch, Erwin Weiss, Werner Bahl, Philip Reese
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Publication number: 20070028352Abstract: An invertible glove includes a hand portion configured to cover a hand of a wearer of the glove, a forearm portion joined with the hand portion, and first and second sealing elements affixed to the forearm portion. When the glove is in a first configuration, the first and second sealing elements bias the forearm portion toward an open position in which the forearm portion defines an opening for receipt of the hand there through in donning of the glove by the wearer, the first and second sealing elements being disposed in surrounding relation to the opening. When the glove is in a second configuration that is inverted relative to the first configuration, the first and second sealing elements are disposed in opposed facing relation to one another and are configured to engage one another in interlocking relation for sealing of the opening defined by the forearm portion.Type: ApplicationFiled: May 17, 2006Publication date: February 8, 2007Applicant: Lisa Kerr-MaddoxInventors: Lisa Kerr-Maddox, Daniel Bizzell