Patents Assigned to Dunhall Pharmaceuticals, Inc.
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Publication number: 20010019817Abstract: An apparatus and method is disclosed for treating a tooth with an active agent such as a tooth whitening agent comprising a stint having an internal region defined by an internal surface. A plurality of indentations are formed in the internal surface for retaining the active agent to maintain the active agent in contact with the tooth when the stint is applied upon the tooth. The stint is molded from a sheet of plastic material with the indentations being formed by an abrading process such as abrasive blasting or the like.Type: ApplicationFiled: February 21, 2001Publication date: September 6, 2001Applicant: Dunhall Pharmaceuticals, Inc.Inventor: Daniel H. Darnell
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Patent number: 5575655Abstract: An apparatus and method is disclosed for treating a tooth with an active agent such as a tooth whitening agent comprising a stint having an internal region defined by an internal surface. A plurality of indentations are formed in the internal surface for retaining the active agent to maintain the active agent in contact with the tooth when the stint is applied upon the tooth. The stint is molded from a sheet of plastic material with the indentations being formed by an abrading process such as abrasive blasting or the like.Type: GrantFiled: October 17, 1994Date of Patent: November 19, 1996Assignee: Dunhall Pharmaceuticals, Inc.Inventor: Daniel H. Darnell
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Patent number: 5356291Abstract: An apparatus and method is disclosed for treating a tooth with an active agent such as a tooth whitening agent comprising a stint having an internal region defined by an internal surface. A plurality of indentations are formed in the internal surface for retaining the active agent to maintain the active agent in contact with the tooth when the stint is applied upon the tooth. The stint is molded from a sheet of plastic material with the indentations being formed by an abrading process such as abrasive blasting or the like.Type: GrantFiled: January 26, 1993Date of Patent: October 18, 1994Assignee: Dunhall Pharmaceuticals, Inc.Inventor: Daniel H. Darnell
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Patent number: 4990089Abstract: There is disclosed a process and a material for brightening teeth. The process comprises the construction of a splint around the tooth or teeth to be brightened, followed by the insertion within the splint of a brightening agent selected from one of many peroxide groups. The splint is constructed so that the splint is relatively liquid tight to the gingiva. The brightening agent is periodically renewed and can be mixed with various other agents to increase the nascent oxygen release aerating factors. In one embodiment, the peroxide that is used is a 10% solution of carbamide peroxide mixed with a water free gel.Type: GrantFiled: May 4, 1990Date of Patent: February 5, 1991Assignee: Dunhall Pharmaceuticals, Inc.Inventor: John R. Munro
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Patent number: RE34196Abstract: There is disclosed a .Iadd.novel .Iaddend.process and a .[.material.]. .Iadd.composition .Iaddend.for brightening teeth.Iadd., together with a novel use of old compositions for brightening teeth. .Iaddend.The .Iadd.novel .Iaddend.process .Iadd.and use each comprises .Iaddend..[.comprises.]. the .[.construction.]. .Iadd.placing .Iaddend.of a splint around the tooth or teeth to be brightened, .[.followed by the insertion within the splint of.]. .Iadd.with .Iaddend.a brightening agent .[.selected from one of many peroxide groups.]. .Iadd.comprising a composition capable of sustained nascent oxygen release.Iaddend.. The splint is constructed so that the splint is relatively liquid tight .[.to the gingiva.].. .Iadd.Preferably, .Iaddend.the brightening agent is periodically renewed .Iadd.during the day .Iaddend.and can be mixed with various other agents to increase the nascent oxygen release .[.aerating factors.].. In one embodiment, the .[.perioxide.]. .Iadd.peroxide .Iaddend.Type: GrantFiled: August 7, 1991Date of Patent: March 16, 1993Assignee: Dunhall Pharmaceuticals, Inc.Inventor: John R. Munro