Patents by Inventor David M. Scott

David M. Scott 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).

  • Publication number: 20200262984
    Abstract: Disclosed herein are compositions comprising aggregates of insoluble alpha-glucan with alpha-1,3-glycosidic linkages. These aggregates have an average hydrodynamic radius of about 50 nm to about 300 nm, and a fractal dimension of about 1.6 to about 2.4. Insoluble alpha-glucan aggregates in some disclosed aspects are arborescent. Further disclosed are methods of preparing these compositions.
    Type: Application
    Filed: November 6, 2018
    Publication date: August 20, 2020
    Inventors: Juan David Londono, Natnael Behabtu, David M. Scott, Yefim Brun
  • Patent number: 8114804
    Abstract: A process for making a self-deagglomerating suspension, in particular, a suspension which self-deagglomerates to form a substantially transparent suspension, of finely divided titanium (IV) oxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, th
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Patent number: 7998453
    Abstract: The disclosure pertains to a process for making a suspension of finely divided titanium (IV) oxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and a ratio of the volume of the first component to the volume of the second compo
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: August 16, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David M Scott, Carmine Torardi, Vladimir Grushin
  • Patent number: 7887779
    Abstract: The disclosure pertains to a process for making anatase titanium dioxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having, a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and a ratio of the volume of the first component to the second component are effective for the suspension of the finely
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 15, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Patent number: 7858553
    Abstract: The disclosure relates to a process for making a surface treated suspension of finely divided titanium (IV) oxide particles, typically, finely divided titanium (IV) oxide nanoparticles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of alcohol, a minor proportion of titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particle, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and the ratio
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: December 28, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David M Scott, Carmine Torardi, Vladimir Grushin
  • Publication number: 20100144518
    Abstract: A process for making a self-deagglomerating suspension, in particular, a suspension which self-deagglomerates to form a substantially transparent suspension, of finely divided titanium (IV) oxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, th
    Type: Application
    Filed: December 20, 2007
    Publication date: June 10, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Publication number: 20100092377
    Abstract: The disclosure pertains to a process for making anatase titanium dioxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having, a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and a ratio of the volume of the first component to the second component are effective for the suspension of the finely
    Type: Application
    Filed: December 20, 2007
    Publication date: April 15, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Publication number: 20100055028
    Abstract: The disclosure pertains to a process for making a suspension of finely divided titanium (IV) oxide particles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of an alcohol, a minor proportion of a titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and (b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particles, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and a ratio of the volume of the first component to the volume of the second componen
    Type: Application
    Filed: December 20, 2007
    Publication date: March 4, 2010
    Applicant: E.I. DuPont De Nemours and Company
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Publication number: 20100022385
    Abstract: The disclosure relates to a process for making a surface treated suspension of finely divided titanium (IV) oxide particles, typically, finely divided titanium (IV) oxide nanoparticles, comprising: vigorously mixing (a) a volume of a first component comprising a major proportion of alcohol, a minor proportion of titanium alkoxide and a minor proportion of a titanium alkoxide activator selected from the group consisting of water and a first aqueous base, and b) a volume of a second component selected from the group consisting of water and a second aqueous base, at least one of the first component or the second component having a base therein, the second component being substantially free of alcohol, to form a mixture comprising a suspension of finely divided titanium (IV) oxide particle, the mixture having a water to titanium molar ratio ranging from about 40 to about 1 to about 5000 to about 1, wherein the proportion of the titanium alkoxide, the proportion of the activator, the mixing vigor, and the ratio
    Type: Application
    Filed: December 20, 2007
    Publication date: January 28, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David M. Scott, Carmine Torardi, Vladimir Grushin
  • Patent number: 5624741
    Abstract: An interconnect structure is characterized by a matrix formed of a continuous, substantially oxygen impermeable, anhygroscopic, inorganic dielectric material, having a dispersion of metal particles therein. The metal particles have an insulating layer thereon and are in abutting contact. The application of a predetermined electrical potential between spaced first and second points on the surface of the interconnect structure causes electrical breakdown of the coatings on the particles in the region between the points of application thereby irreversibly forming an electrical conduction path through the interconnect structure between the first and the second points.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: April 29, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David M. Scott
  • Patent number: 5341436
    Abstract: A real-time radioscopy system produces an X-ray image of a sample of reinforced composite material or a manufactured part that has been molded from the reinforced composite material. By examining the statistics of the distribution of gray levels within the image, it is possible to measure the local and average reinforcing material content (loading) as well as how well the reinforcing material is distributed (the reinforcing material dispersion). The mean gray level is used to determine the local loading of the reinforcing material, which is measured as a function of position in the sample or part using this technique. In addition, an average value of the loading may be obtained. The standard deviation of the gray level image correlates with the quality of dispersion of the reinforcing material.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: August 23, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: David M. Scott
  • Patent number: 4762597
    Abstract: An electrochemical process for oxidizing an ore, such as a refractory ore, utilizes a centrifugal reactor having a central rotor cathode, the circumference of which is enclosed by an anode housing defining an active anode surface. The crushed ore is pulped in an aqueous chloride containing electrolyte and applied to the active anode surface. The reactor is spun in the presence of sufficient electrolyte to establish an electric circuit between the cathode and the anode, and so that a fluid pressure of from about 10 psi to about 100 psi is obtained at the active anode surface. A current density is provided at the active anode surface of from about 0.1 amp/sq.in. to about 1.0 amp/sq.in. so that chlorine is generated at the anode and the crushed ore particles are oxidized to release metal values of interest.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: August 9, 1988
    Inventor: David M. Scott