Patents by Inventor Choon Ki Lee
Choon Ki Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7582310Abstract: Disclosed herein is a biodegradable and bioactive glass-ceramic fabricated by mixing a slowly biodegradable glass-ceramic and a highly biodegradable glass-ceramic in a predetermined mixing ratio wherein the bioactivity is maintained to be constant, and the biodegradation rate is controlled by the mixing ratio. The biodegradable and bioactive glass-ceramic is fabricated from a composition consisting of calcium oxide (CaO), silica (SiO2), boron oxide (B2O3), magnesium oxide (MgO), calcium fluoride (CaF2) and phosphorus pentoxide (P2O5).Type: GrantFiled: August 27, 2003Date of Patent: September 1, 2009Assignee: Seoul National University Industry FoundationInventors: Hyun Seung Yu, Kug Sun Hong, Hwan Kim, Dong Ho Lee, Choon Ki Lee, Bong Soon Chang, Deug Joong Kim, Jun Hyuk Seo, Jae Hyup Lee, Ki Soo Park
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Patent number: 7351433Abstract: Disclosed is a method for producing a transparent and homogenized polymeric sol of a calcium phosphate compound, containing apatite and having excellent wettability and bioactivity, according to a sol-gel synthesis, and a method for coating the polymeric sol on a metal implant, in which the polymeric sol is coated on the metal implant and then heat-treated to form a dense coated layer strongly bonded to the metal implant. The polymeric sol is obtained by process of preparing a calcium salt solution, containing calcium ethoxide dissolved in organic acid, and a phosphate solution, containing triethyl phosphite or triethyl phosphate dissolved in the organic acid, mixing the calcium salt solution with the phosphate solution to produce a mixed solution, and aging the mixed solution.Type: GrantFiled: March 26, 2004Date of Patent: April 1, 2008Assignee: Seoul National University Industry FoundationInventors: Hyun Seung Yu, Dong Soo Lee, Kug Sun Hong, Choon Ki Lee, Jae hyup Lee, Dong Ho Lee, Bong Soon Chang, Jin Young Kim, Sung Soo Chung
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Patent number: 7169721Abstract: Disclosed herein are a self-foamed porous ceramic composition and a method for making a porous ceramic using the self-foamed porous ceramic composition. The self-foamed porous ceramic is obtained by fabricating a glass consisting of 41˜47 mole % of calcium oxide (CaO), 41˜47 mole % of silica (SiO2) and 6˜18 mole % of borate (B2O3), pulverizing the glass into a finely-divided glass powder having an average particle size of 1˜10 ?m, molding the glass powder, and sintering the molded glass powder.Type: GrantFiled: August 27, 2003Date of Patent: January 30, 2007Assignee: Seoul National University Industry FoundationInventors: Hyun Seung Yu, Kug Sun Hong, Hwan Kim, Dong Ho Lee, Choon Ki Lee, Bong Soon Chang, Deug Joong Kim, Jun Hyuk Seo, Jae Hyup Lee, Ki Soo Park
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Patent number: 7037867Abstract: A bone graft substitute using magnesium substituted calcium phosphate compounds and a method of manufacturing the same is provided in which the bone graft substitute is used for recovering bones damaged due to a bone fracture. The method of manufacturing a bone graft substitute includes the steps of mixing powdered calcium pyrophosphate and a magnesium included compound to thereby obtain a composition, pressure-forming the compositions to obtain a plastic body; and sintering the plastic body.Type: GrantFiled: October 18, 2002Date of Patent: May 2, 2006Assignee: Seoul National University Industry FoundationInventors: Hyun Seung Yu, Kug Sun Hong, Choon Ki Lee, Dong Ho Lee, Sang Lim Lee, Bong Soon Chang, Su Jin Kim, Chang Kyun Lim
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Patent number: 6793657Abstract: A spine-fixing apparatus includes a plurality of spine screw members fixed to a spine in a predetermined interval, a pair of rods coupled to the spine screw members for supporting the spine, a plurality of fixing nuts coupled to the spine screw members, and a plurality of pressing pieces interposed between the fixing nuts and the spine screw members for pressing and fixing the rods.Type: GrantFiled: September 10, 2001Date of Patent: September 21, 2004Assignees: Solco Biomedical Co., Ltd.Inventors: Choon Ki Lee, Cheol Sang Kim, Sung Pil Choi, Duc Soo Moon, Sang Soo Park, Seayoung Ahn
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Publication number: 20040053766Abstract: Disclosed herein are a self-foamed porous ceramic composition and a method for making a porous ceramic using the self-foamed porous ceramic composition. The self-foamed porous ceramic is obtained by fabricating a glass consisting of 41˜47 mole % of calcium oxide (CaO), 41˜47 mole % of silica (SiO2) and 6˜18 mole % of borate (B2O3), pulverizing the glass into a finely-divided glass powder having an average particle size of 1˜10 &mgr;m, molding the glass powder, and sintering the molded glass powder.Type: ApplicationFiled: August 27, 2003Publication date: March 18, 2004Inventors: Hyun Seung Yu, Kug Sun Hong, Hwan Kim, Dong Ho Lee, Choon Ki Lee, Bong Soon Chang, Deug Joong Kim, Jun Hyuk Seo, Jae Hyup Lee, Ki Soo Park
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Publication number: 20040043053Abstract: Disclosed herein is a biodegradable and bioactive glass-ceramic fabricated by mixing a slowly biodegradable glass-ceramic and a highly biodegradable glass-ceramic in a predetermined mixing ratio wherein the bioactivity is maintained to be constant, and the biodegradation rate is controlled by the mixing ratio. The biodegradable and bioactive glass-ceramic is fabricated from a composition consisting of calcium oxide (CaO), silica (SiO2), boron oxide (B2O3), magnesium oxide (MgO), calcium fluoride (CaF2) and phosphorus pentoxide (P2O5).Type: ApplicationFiled: August 27, 2003Publication date: March 4, 2004Inventors: Hyun Seung Yu, Kug Sun Hong, Hwan Kim, Dong Ho Lee, Choon Ki Lee, Bong Soon Chang, Deug Joong Kim, Jun Hyuk Seo, Jae Hyup Lee, Ki Soo Park
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Publication number: 20040023784Abstract: A bioactive biphasic ceramic composition combining apatite and wollastonite is disclosed, in order to solve the defect of apatite ceramic that has poor bioactivity though it is excellent in biocompatibility, which has improved bioactivity, as compared to monophasic ceramics of apatite or wollastonite. The ceramic composition is produced by steps of: providing a composition including powders of apatite of formula Ca10(PO4)6X, in which X is any one of O, (OH)2, CO3, F2 and Cl2, and wollastonite (CaSiO3) in a weight ratio of 5:95 to 90:10, forming the composition into a desired body by press or forming the composition into a porous body, and sintering the formed body.Type: ApplicationFiled: February 4, 2003Publication date: February 5, 2004Inventors: Hyun Seung Yu, Kug Sun Hong, Choon Ki Lee, Dong Ho Lee, Jae Hyup Lee, Bong Soon Chang, Su Jin Kim, Sung Soo Chung
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Publication number: 20030193106Abstract: A bone graft substitute using magnesium substituted calcium phosphate compounds and a method of manufacturing the same is provided in which the bone graft substitute is used for recovering bones damaged due to a bone fracture. The method of manufacturing a bone graft substitute includes the steps of mixing powdered calcium pyrophosphate and a magnesium included compound to thereby obtain a composition, pressure-forming the compositions to obtain a plastic body; and sintering the plastic body.Type: ApplicationFiled: October 18, 2002Publication date: October 16, 2003Inventors: Hyun Seung Yu, Kug Sun Hong, Choon Ki Lee, Dong Ho Lee, Sang Lim Lee, Bong Soon Chang, Su Jin Kim, Chang Kyun Lim
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Patent number: 6592585Abstract: The present invention relates to an apparatus for fixing the spine, and particularly to a spine fixing apparatus for fixing an unstable spine, caused by a fracture or a disease, to be properly collaborated together such that the spine can recover its stable state. The present invention provides a spine fixing apparatus, comprising a plurality of spine screw members combined to the spine with a certain distance; a pair of rods detachably combined to the spine screw members, the rods connecting and supporting the spine screw members; pressing members detachably combined to the spine screw members, the pressing member pressing the rod toward the spine screw member; and a connecting device integrally combined to the pressing member, the connecting device flexibly connecting the spine screw members.Type: GrantFiled: June 12, 2001Date of Patent: July 15, 2003Assignees: Solco Surgical Instruments Co., Ltd.Inventors: Choon Ki Lee, Cheol Sang Kim, Sung Pil Choi
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Publication number: 20030050640Abstract: A spine-fixing apparatus includes a plurality of spine screw members fixed to a spine in a predetermined interval, a pair of rods coupled to the spine screw members for supporting the spine, a plurality of fixing nuts coupled to the spine screw members, and a plurality of pressing pieces interposed between the fixing nuts and the spine screw members for pressing and fixing the rods.Type: ApplicationFiled: September 10, 2001Publication date: March 13, 2003Applicant: Solco Biomedical Co., Ltd.Inventors: Choon Ki Lee, Cheol Sang Kim, Sung Pil Choi, Duc Soo Moon, Sang Soo Park, Seayoung Ahn
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Publication number: 20020007183Abstract: The present invention relates to an apparatus for fixing the spine, and particularly to a spine fixing apparatus for fixing an unstable spine, caused by a fracture or a disease, to be properly collaborated together such that the spine can recover its stable state.Type: ApplicationFiled: June 12, 2001Publication date: January 17, 2002Applicant: Solco Surgical Instruments Co., Ltd.Inventors: Choon Ki Lee, Cheol Sang Kim, Sung Pil Choi
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Patent number: 6264658Abstract: An apparatus for fixing the spine, and particularly to a spine fixing apparatus for fixing an unstable spine, caused by a fracture or a disease, to be properly collaborated together such that the spine can recover its stable state. The spine fixing apparatus comprising a plurality of spine screw members combined to the spine with a certain distance; a pair of rods detachably combined to the spine screw members, the rods connecting and supporting the spine screw members; pressing members detachably combined to the spine screw members, the pressing member pressing the rod toward the spine screw member; and a connecting device integrally combined to the pressing member, the connecting device flexibly connecting the spine screw members.Type: GrantFiled: July 2, 1999Date of Patent: July 24, 2001Assignees: Solco Surgical Instruments Co., Ltd.Inventors: Choon Ki Lee, Cheol Sang Kim, Sung Pil Choi