Patents by Inventor Mark S. Chagnon
Mark S. Chagnon 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: 5935866Abstract: Inorganic oxides of substantially uniform particle size distribution are prepared by contacting aqueous solutions of an inorganic salt and an inorganic base across a porous membrane wherein the membrane contains a plurality of pores which allows for precipitation of a substantially mono-disbursed size inorganic oxide particles on one side of the membrane and precipitation of a salt of the corresponding base on a second side of the membrane.Type: GrantFiled: June 8, 1992Date of Patent: August 10, 1999Assignee: Binax NH, Inc.Inventors: Mark S. Chagnon, John R. Ferris, Michelle J. Carter, Tracy J. Hamilton, Maria A. Gray
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Patent number: 5547682Abstract: Novel N-RES agents for use in vitro and in vivo medical and biological applications, such as, for example MRI and/or intravenous administration of pharmaceutical agents are described. The novel N-RES agents are prepared by coating inorganic core particles with a poly(acrylic acid)--poly(alkylene ether) graft copolymer. The resulting polymer-coated inorganic particle cores are useful as imaging agents, therapeutic agents or carriers having increased circulation time due to decrease uptake or recognition by the RES.Type: GrantFiled: July 20, 1994Date of Patent: August 20, 1996Assignee: BioQuest, IncorporatedInventors: Mark S. Chagnon, Stephen E. Burkle, Michelle J. Carter, Tracy J. Hamilton, John Havelick, Jr., Deborah A. Kaplan, Kristin L. Marzloff
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Patent number: 5441746Abstract: This invention describes an electromagnetic wave-absorbing surface modified magnetic particle for use in medical applications. The magnetic particles are coated with an amphipathic organic compound and an amphipathic vesicle forming lipid. These particles may be used in a method of treatment of cancer, as well as for the treatment of infectious disease. For cancer treatment the invention comprises providing a patient said coated particles, absorbing the coated particle intracellularly into the cancer cell, and subjecting the patient to an alternating electromagnetic field to inductively heat the magnetic core particle along with the cancer cells. The inductive heating of the magnetic core particle is then continued so as to achieve an increase in intracellular temperature which selectively kills the cancer cells.Type: GrantFiled: May 5, 1993Date of Patent: August 15, 1995Assignee: Molecular BioQuest, Inc.Inventor: Mark S. Chagnon
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Patent number: 5389377Abstract: A liposome composition which comprises a substantially uniform sized inorganic core coated with an amphipathic organic compound and further coated with a second amphipathic vesicle forming lipid. Also disclosed are novel phenyl lipid compounds which serve as the amphipathic vesicle forming lipid and methods are described for delivering a drug for slow release into the blood stream, and for targeting a selected tissue or cells with the inorganic core liposome compositions.Type: GrantFiled: October 7, 1992Date of Patent: February 14, 1995Assignee: Molecular Bioquest, Inc.Inventors: Mark S. Chagnon, John R. Ferris, Tracy J. Hamilton, Edwin A. Rudd, Michelle J. Carter
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Patent number: 5382468Abstract: Subdomain metal or metal oxide particles covalently coupled to chemically reactive organic moieties and subsequently reacted together to form biodegradable magnetic microclusters are disclosed. The magnetic microcluster can be used as contrast agents in NMR imaging for the production of images suitable for use in diagnosis, for in vivo delivery and targeting of drugs, as in vivo, biodegradable agents for the sequestering of free metal ions in the treatment of metal driven disease.Type: GrantFiled: December 22, 1992Date of Patent: January 17, 1995Assignee: Molecular Bioquest, Inc.Inventors: Mark S. Chagnon, John R. Ferris, Barry L. Fiore, Michelle J. Carter, Tracy J. Hamilton
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Patent number: 5225282Abstract: Subdomain metal or metal oxide particles covalently coupled to chemically reactive organic moieties and subsequently reacted together to form biodegradable magnetic microclusters are disclosed. The magnetic microcluster can be used as contrast agents in NMR imaging for the production of images suitable for use in diagnosis, for in vivo delivery and targeting of drugs, as in vivo, biodegradable agents for the sequestering of free metal ions in the treatment of metal driven disease.Type: GrantFiled: December 13, 1991Date of Patent: July 6, 1993Assignee: Molecular BioQuest, Inc.Inventors: Mark S. Chagnon, John R. Ferris, Barry L. Fiore, Michelle J. Carter, Tracy J. Hamilton
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Patent number: 5147573Abstract: Electrically-conductive superparamagnetic liquid colloids and methods for making and using them are described. The magnetic liquid colloids contain magnetic particles coated with conductive, organio-metallic compund, which impart the magnetic and conductive characteristics to the fluid. The coated magnetic particles are dispersed in a carrier fluid that gives the fluid viscosity, flow and vapor pressure properties.Type: GrantFiled: November 26, 1990Date of Patent: September 15, 1992Assignee: Omni Quest CorporationInventor: Mark S. Chagnon
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Patent number: 5071076Abstract: A novel method for producing magnetic microparticles from metallocenes is disclosed. The method involves combining an aqueous slurry of the metallocene and an aqueous slurry of a metal hydroxide and milling the slurries together. Fine magnetic particles are produced using the present method.Type: GrantFiled: August 10, 1990Date of Patent: December 10, 1991Assignee: Omni Quest CorporationInventors: Mark S. Chagnon, Tracy Hamilton, John R. Ferris
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Patent number: 4944802Abstract: Magnetic inks useful for the production of magnetic recording products are disclosed. The present magnetic inks contain ferromagnetic barium ferrite particles dispersed in a flexible polymer medium.Type: GrantFiled: September 16, 1988Date of Patent: July 31, 1990Assignee: Omni Quest CorporationInventors: Mark S. Chagnon, John R. Ferris
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Patent number: 4698302Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.Type: GrantFiled: June 13, 1985Date of Patent: October 6, 1987Assignee: Advanced Magnetics, Inc.Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
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Patent number: 4695392Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.Type: GrantFiled: June 13, 1985Date of Patent: September 22, 1987Assignee: Advanced Magnetics Inc.Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
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Patent number: 4695393Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.Type: GrantFiled: June 13, 1985Date of Patent: September 22, 1987Assignee: Advanced Magnetics Inc.Inventors: Mark S. Chagnon, Ernest V. Groman, Lee Josephson, Roy A. Whitehead
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Patent number: 4628037Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.Type: GrantFiled: June 13, 1985Date of Patent: December 9, 1986Assignee: Advanced Magnetics, Inc.Inventors: Mark S. Chagnon, Ernest V. Groman, Lee Josephson, Roy A. Whitehead
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Patent number: 4554088Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.Type: GrantFiled: May 12, 1983Date of Patent: November 19, 1985Assignee: Advanced Magnetics Inc.Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
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Patent number: 4374809Abstract: Molybdenum is removed from an aqueous solution containing tungsten and molybdenum by extracting the molybdenum from the aqueous solution having a pH greater than 8.5 with a liquid organic extractant containing a preferred complexing agent, 3,4-dimercaptotoluene.Type: GrantFiled: October 16, 1981Date of Patent: February 22, 1983Assignee: GTE Laboratories IncorporatedInventors: Mark S. Chagnon, Joseph E. Lester, Samuel Natansohn
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Patent number: 4356098Abstract: A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a silicone-oil surfactant containing a functional group which forms a chemical bond with the surface of the particles and a tail group which is soluble in the silicone-oil carrier, to provide a stable ferrofluid composition.Type: GrantFiled: September 15, 1980Date of Patent: October 26, 1982Assignee: Ferrofluidics CorporationInventor: Mark S. Chagnon
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Patent number: 4315827Abstract: A stable ferrofluid composition which comprises a colloidal dispersion of finely-divided magnetic particles in a liquid, low-pressure, polyphenyl ether carrier and a dispersing amount of a surfactant, which surfactant comprises a polyphenyl ether surfactant containing a functional group, such as an acidic group, and an aromatic tail group which is soluble in the polyphenyl ether carrier, to provide a stable ferrofluid composition.Type: GrantFiled: February 13, 1981Date of Patent: February 16, 1982Assignee: Ferrofluidics CorporationInventors: William R. Bottenberg, Mark S. Chagnon