Patents by Inventor Donald R. Cowsar
Donald R. Cowsar 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: 8324346Abstract: Compositions containing biologically active peptides are disclosed. Active peptides are isolated fragments derived from human hair or sheep wool keratin proteins. Compositions may be prepared for pharmaceutical or topical administration or for use in cosmetic preparations.Type: GrantFiled: February 26, 2009Date of Patent: December 4, 2012Assignee: Keraplast Technologies, Ltd.Inventor: Donald R. Cowsar
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Patent number: 8101202Abstract: Useful materials are produced from keratin containing raw materials by a process that includes gentle lanthionization of cystine disulfide bonds. Hydratable materials are produced for use in medical and cosmetic applications.Type: GrantFiled: June 9, 2005Date of Patent: January 24, 2012Assignee: Keraplast Technologies, LtdInventors: Keith Edward Branham, James Perry English, Donald R. Cowsar
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Publication number: 20110070276Abstract: Compositions containing biologically active peptides are disclosed. Active peptides are isolated fragments derived from human hair or sheep wool keratin proteins. Compositions may be prepared for pharmaceutical or topical administration or for use in cosmetic preparations.Type: ApplicationFiled: February 26, 2009Publication date: March 24, 2011Inventor: Donald R. Cowsar
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Patent number: 7501485Abstract: Compositions containing biologically active peptides are disclosed. Active peptides are isolated fragments derived from human hair or sheep wool keratin proteins. Compositions may be prepared for pharmaceutical or topical administration or for use in cosmetic preparations.Type: GrantFiled: January 28, 2003Date of Patent: March 10, 2009Assignee: Keraplast Technologies, Ltd.Inventor: Donald R. Cowsar
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Publication number: 20080249451Abstract: Useful materials are produced from keratin containing raw materials by a process that includes gentle lanthionization of cystine disulfide bonds. Hydratable materials are produced for use in medical and cosmetic applications.Type: ApplicationFiled: June 9, 2005Publication date: October 9, 2008Inventors: Keith Edward Branham, James Perry English, Donald R. Cowsar
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Publication number: 20030228353Abstract: Compositions containing biologically active peptides are disclosed. Active peptides are isolated fragments derived from human hair or sheep wool keratin proteins. Compositions may be prepared for pharmaceutical or topical administration or for use in cosmetic preparations.Type: ApplicationFiled: January 28, 2003Publication date: December 11, 2003Applicant: Keraplast Technologies, Ltd.Inventor: Donald R. Cowsar
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Patent number: 5990194Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: November 7, 1997Date of Patent: November 23, 1999Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David P. Vanderbilt
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Patent number: 5849277Abstract: Methods for preparing hair relaxer compositions which comprise a lithium salt and an alkaline earth hydroxide, wherein the lithium salt is in molar excess to the alkaline earth hydroxide. Compositions, kits containing the compositions, and methods for using the compositions are also disclosed.Type: GrantFiled: August 16, 1996Date of Patent: December 15, 1998Assignee: Carson Products CompanyInventor: Donald R. Cowsar
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Patent number: 5739176Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: March 18, 1994Date of Patent: April 14, 1998Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David D. Vanderbilt
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Patent number: 5733950Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: September 25, 1995Date of Patent: March 31, 1998Assignee: Atrix Laboratories, IncorporatedInventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David P. Vanderbilt
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Patent number: 5609859Abstract: Methods for preparing hair relaxer compositions which comprise a lithium salt and an alkaline earth hydroxide, wherein the lithium salt is in molar excess to the alkaline earth hydroxide. Compositions, kits containing the compositions, and methods for using the compositions are also disclosed.Type: GrantFiled: January 13, 1995Date of Patent: March 11, 1997Assignee: Carson Products CompanyInventor: Donald R. Cowsar
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Patent number: 5565216Abstract: The present invention relates to a two-component hair relaxer system comprising (a) a first component comprising a cream base containing a water-soluble salt of a relatively strong base with an anion capable of being precipitated by an alkaline earth metal ion under highly alkaline conditions, and (b) a second, separate component, which is substantially free of water, and containing an alkaline material having an alkaline earth metal ion which forms a precipitate with the anion when the first component and second component are mixed.Type: GrantFiled: July 21, 1993Date of Patent: October 15, 1996Assignee: Carson Products CompanyInventors: Donald R. Cowsar, Tony R. Adair
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Patent number: 5340849Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: December 23, 1991Date of Patent: August 23, 1994Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David D. Vanderbilt
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Patent number: 5278202Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: December 23, 1991Date of Patent: January 11, 1994Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David D. Vanderbilt
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Patent number: 5278201Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: April 24, 1990Date of Patent: January 11, 1994Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David P. Vanderbilt
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Patent number: 5085866Abstract: An improved method of producing a reservoir device having a rate-controlling membrane and zero-order (constant) release of an agent is provided. A core is sprayed with a solution having a polymer and a solvent, the solvent having a first component which is a rapidly evaporating, low-boiling-point first solvent and a slowly evaporating, high-boiling-point second solvent.Type: GrantFiled: December 2, 1988Date of Patent: February 4, 1992Assignee: Southern Research InstituteInventors: Donald R. Cowsar, Richard L. Dunn, Thomas J. Laughlin
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Patent number: 5068220Abstract: Biodegradable polyamides, useful as absorbable sutures and as controlled release binder materials, are prepared by condensing 4,4'-spirobibutyrolactone with a primary diamine, optionally in the presence of a nylon salt, leading to homopolymers containing lactam structural units, or to random copolymers.Type: GrantFiled: June 8, 1990Date of Patent: November 26, 1991Assignee: Sharpoint L.P.Inventors: David P. Vanderbilt, Donald R. Cowsar, Richard L. Dunn, James P. English
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Patent number: 4950735Abstract: Biodegradable polyamides, useful as absorable sutures and as controlled release binder materials, are prepared by condensing 4,4'-spirobibutyrolactone with a primary diamine, optionally in the presence of a nylon salt, leading to homopolymers containing lactam structural units, or to random copolymers.Type: GrantFiled: July 26, 1988Date of Patent: August 21, 1990Assignee: Sharpoint L.P.Inventors: David P. Vanderbilt, Donald R. Cowsar, Richard L. Dunn, James P. English
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Patent number: 4938763Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: October 3, 1988Date of Patent: July 3, 1990Inventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David P. Vanderbilt
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Patent number: RE37950Abstract: A biodegradable polymer is provided for use in providing syringeable, in-situ forming, solid biodegradable implants for animals. The polymer is placed into the animal in liquid form and cures to form the implant in-situ. A thermoplastic system to form said implant comprises the steps of dissolving a non-reactive polymer in biocompatible solvent to form a liquid, placing the liquid within the animal, and allowing the solvent to dissipate to produce the implant. An alternative, thermosetting system comprises mixing together effective amounts of a liquid acrylic ester terminated, biodegradable prepolymer and a curing agent, placing the liquid mixture within an animal and allowing the prepolymer to cure to form the implant. Both systems provide a syringeable, solid biodegradable delivery system by the addition of an effective level of biologically active agent to the liquid before injection into the body.Type: GrantFiled: March 28, 2000Date of Patent: December 31, 2002Assignee: Atrix LaboratoriesInventors: Richard L. Dunn, James P. English, Donald R. Cowsar, David P. Vanderbilt