Patents Examined by H. Thi Lê
  • Patent number: 6951583
    Abstract: The present invention relates to a powder comprising boron nitride particles having an aspect ratio of from about 50 to about 300. The present invention also relates to a method of making delaminated boron nitride powder. This method involves providing boron nitride powder and milling the boron nitride powder in a mixture including a milling media and a milling liquid under conditions effective to produce delaminated boron nitride powder.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: October 4, 2005
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Thomas M. Clere, Séverine M. Labouré
  • Patent number: 6939610
    Abstract: To protect spacecraft and their contents from excessive heat thermal protection systems are essential. For such thermal protection, metal coatings, ceramic materials, ablative materials, and various matrix materials have all been tried, but none have been found entirely satisfactory. The basis for this thermal protection system is the fact that the heat required to melt a substance is 80 to 100 times larger than the heat required to raise its temperature one degree. This led to the use herein of solid-liquid phase change materials. Unlike conventional heat storage materials, when phase change materials reach the temperature at which they change phase they absorb large amounts of heat without getting hotter. By this invention, then, a coating composition is provided for application to substrates subjected to temperatures above 100° F. The coating composition includes a phase change material.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: September 6, 2005
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Raj K. Kaul
  • Patent number: 6939575
    Abstract: A ferromagnetic metal powder having an average long axis length of from 30 to 65 nm, a crystallite size of from 80 to 130 angstroms, a saturation magnetization (?s) of from 75 to 130 A·m2/kg, and an average oxide layer thickness of from 1.5 to 2.5 nm; a method of producing a ferromagnetic metal powder comprising: reducing the oxide of a ferromagnetic metal element to obtain the ferromagnetic metal powder, subjecting the ferromagnetic metal powder to gradual oxidation treatment to make as 120 to 150 A·m2/kg, adhering at least one element selected from Al, Y, lanthanoid, Zr and W to the ferromagnetic metal powder in water, performing heat treatment, and again performing gradual oxidation treatment; and a magnetic recording medium comprising a support having provided thereon a magnetic layer mainly comprising a ferromagnetic metal powder and a binder, wherein the magnetic layer containing the ferromagnetic metal powder has a thickness of from 0.04 to 0.25 ?m, and demagnetization after storage at 60° C.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: September 6, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Masashi Aonuma
  • Patent number: 6936356
    Abstract: A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, a magnetic layer formed on the primer layer, and a backcoat layer formed on the other surface of the non-magnetic support, wherein the magnetic layer has a thickness of 0.30 ?m or less and a centerline average surface roughness Ra of 3.2 nm or less, and (P1?P0) is 30 nm or less and (P1?P20) is 5 nm or less in which P0 is an averaged height of projections of the magnetic layer, and P1, P2, - - - and P20 are heights of the highest, the second highest, - - - and the 20th highest projections of the magnetic layer, respectively.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: August 30, 2005
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Masakazu Tani, Yoshiyuki Makita, Norihisa Yoshimoto, Kenichiro Yoshida
  • Patent number: 6936344
    Abstract: A new product is described characterized by its qualities to absorb undesirable scents present in the air, while serving at the same time as a carrier for aromas, fragrances, flavorings, repellents, attractants and other active ingredients. The active ingredients are gradually released by the carrier, which is compatible with the environment and current tendencies towards the use of organic and biodegradable products. The composition comprises a carrier and an active ingredient. The carrier is characterized as being particles obtained from the milling, separation, air wash and classification of the different fractions obtained from corncobs.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: August 30, 2005
    Assignee: Aproa Asesores S.C.
    Inventors: Jose Represas de Almeida, Genaro Casas Jassan, Jose Fuentes Rosbery
  • Patent number: 6933048
    Abstract: Interference pigment flakes and foils are provided which have color shifting properties. The pigment flakes can have a symmetrical coating structure on opposing sides of a reflector layer, can have an asymmetrical coating structure with all of the layers on one side of the reflector layer, or can be formed with encapsulating coatings around a core reflector layer. The coating structure of the flakes and foils includes a reflector layer, a dielectric layer on the reflector layer, and a titanium-containing absorber layer on the dielectric layer. The pigment flakes and foils exhibit a discrete color shift so as to have a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing. The pigment flakes can be interspersed into liquid media such as paints or inks to produce colorant compositions for subsequent application to objects or papers.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: August 23, 2005
    Assignee: JDS Uniphase Corporation
    Inventors: Roger W. Phillips, Charlotte R. LeGallee, Paul T. Kohlmann, Vladimir Raksha, Alberto Argoitia
  • Patent number: 6929859
    Abstract: An improved method of making a series of bead or microsphere or particle populations characterized by subtle variation in a proportion or ratio of at least two fluorescent dyes distributed within a single bead of each population is provided. These beads, when excited by a single excitation light source are capable of giving off several fluorescent signals simultaneously. A set containing as many as 64 distinct populations of multicolored, fluorescent beads is provided and when combined with analytical reagents bound to the surface of such beads is extremely useful for multiplexed analysis of a plurality of analytes in a single sample. Thus, methods of staining polymeric particles, the particles themselves, and methods of using such particles are claimed.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: August 16, 2005
    Inventors: Don J. Chandler, Van S. Chandler, Beth A. Lambert, Janet J. Reber, Stacie L. Phipps
  • Patent number: 6929860
    Abstract: Surface-modified fillers are described characterized by the fact that the fillers represent reactive inorganic fillers and the modifying agent represents an amphiphilic aminoplastic-ether polymer or copolymer of the structural type in which: Z denotes the same or different aminoplastic central units based on melamine-formaldehyde or urea-formaldehyde derivatives; n=10 to 500; R denotes the group —[O—CH2—CH2]mO—S in which m=5 to 500 and S represents a substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: August 16, 2005
    Assignee: Sud-Chemie AG
    Inventors: Alan Lawrence Steinmetz, Norbert Schall, Klaus Dziwok, Helmut Coutelle, Wolfgang Simon, Stefan Dick, Inge Krämer, Hubert Schiessling
  • Patent number: 6926954
    Abstract: A decorative sheet or a molding, in particular suitable for indoor or outdoor applications on buildings, is in each case composed of a single- or multi-layer core, monolaterally or bilaterally laminated with decorative layer(s) The core layer(s) comprise(s) wood fibers, cellulose fibers, or timber sawdust products and also an organic or inorganic filler material, and a hot-curing resin. The particle size of the filler material is smaller than the thickness of the fibers or of the timber sawdust products in the core layer(s). These core layer(s) are composed of from 15 to 80% by weight of fibers or of timber sawdust products, from 10 to 75% by weight of filler material, and from 10 to 50% by weight of resin, based in each case on the total weight of the core layer(s).
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: August 9, 2005
    Assignee: Trespa International B.V.
    Inventors: Geer Schuren, Chris Van Der Vorst
  • Patent number: 6924033
    Abstract: Adsorbent particles comprising superparamagnetic and/or low Curie Temperature transition metal-containing cores surrounded by a hydrous siliceous oxide coating can be formed by an aqueous process wherein the core is precipitated from an aqueous solution and a siliceous oxide coating is deposited thereon while complete drying of the core is avoided until after the siliceous oxide is deposited. The resulting siliceous adsorbents exhibit strong superparamagnetic and/or low Curie temperature magnetic properties with low transition metal leachability.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: August 2, 2005
    Assignee: W.R. Grace & Co. -Conn.
    Inventors: James Neil Pryor, Linda Lee Crump
  • Patent number: 6924035
    Abstract: Described is a process for preparing polymer-enrobed pigment particles, which comprises mixing in the presence of finely dispersed pigment particles a solution of a polymer in a first solvent with a second solvent in which the polymer is substantially insoluble. The pigment particle can be specifically modified by judicious selection of the polymer.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: August 2, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Auweter, Heribert Bohn, Walter Mächtle, Manfred Mielke, Rüdiger Sens, Karl Siemensmeyer
  • Patent number: 6921592
    Abstract: A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, a magnetic layer formed on the primer layer, and a backcoat layer formed on the other surface of the non-magnetic support, wherein the magnetic layer has a thickness of 0.30 ?m or less and a centerline average surface roughness Ra of 3.2 nm or less, and (P1?P0) is 30 nm or less and (P1-P20) is 5 nm or less in which P0 is an averaged height of projections of the magnetic layer, and P1, P2, - - - and P20 are heights of the highest, the second highest, - - - and the 20th highest projections of the magnetic layer, respectively.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: July 26, 2005
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Masakazu Tani, Yoshiyuki Makita, Norihisa Yoshimoto, Kenichiro Yoshida
  • Patent number: 6919063
    Abstract: The present invention relates to a novel carbon nano-particle and a novel method of preparing the same and a transparent, conductive polymer composite containing the same. The carbon nano-particle has the mean diameter of 1 through 50 nm and the shape of sphere, rod or others, which is a novel material not known in the relevant art. Because of a particle size less than ½ of the shortest wavelength of a visible ray, a transparent resin containing the carbon nano-particle can maintain the transparency. Furthermore, the carbon nano-particle has the excellent electric conductivity and the ferromagnetic property, and can be made by a novel, low cost method entirely different from those of fullerene and carbon nanotube.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: July 19, 2005
    Assignee: Dong Woon International Co., Ltd.
    Inventors: Jyongsik Jang, Joon Hak Oh, Dong Cheol Kim
  • Patent number: 6916514
    Abstract: The invention relates to a cationic shelled particle comprising a colloidal alumina core having a median diameter of between 20 and 2000 nm and a positive charge, a layer on the surface of said core particle having a negative charge and comprising particles of a median diameter of less than 30% of the median diameter of said core particle, and an outer layer of positive charge.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: July 12, 2005
    Assignee: Eastman Kodak Company
    Inventors: Joseph F. Bringley, Katherine M. Broadus, Lori Shaw-Klein, Gary N. Barber
  • Patent number: 6916536
    Abstract: The present invention relates in general to the preparation of composites having filler particles and an interstitial polymer resin attached to the filler particles by a polyvalent tether.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: July 12, 2005
    Inventors: Christopher R. Hammen, Richard F. Hammen
  • Patent number: 6916368
    Abstract: A curable film-forming composition is provided that on curing produces a coating, comprising in a medium (i) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a crosslinking agent; (ii) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) 20 to 85 percent by volume based on the total volume of the film-forming composition of particles having a mean particle size less than 100 nm. The particles further have an index of refraction sufficiently similar to that of the polymer of (ii) to minimize haze, and have an affinity for the medium sufficient to keep the particles suspended therein. The affinity of the particles for the medium is greater than the affinity of the particles for each other, thereby preventing agglomeration of the particles within the medium.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: July 12, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Noel R. Vanier, Calum H. Munro, James A. Claar, Robert E. Jennings
  • Patent number: 6913787
    Abstract: This invention relates to coated particles used as phosphor particles for a phosphor screen of a display and a coating method for such particles. In the coating method of the present invention, first particles having a mean particle diameter of 3 to 10 ?m are fluidized, and slurry drops obtained by suspending second particles having a mean particle diameter of 5 to 500 nm are generated from a spray nozzle or the like. Then, the fluidized first particles and the slurry drops are collided with each other, and thereby the second particles are coated on the surfaces of the first particles. Thereby, this invention is able to present coated particles wherein each surface of the first particles is uniformly coated with the second particles that are more microscopic than the first particles.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: July 5, 2005
    Assignee: Sony Corporation
    Inventors: Takahiro Igarashi, Tsuneo Kusunoki, Katsutoshi Ohno
  • Patent number: 6902806
    Abstract: The present invention provides a hexagonal mesoporous silica comprising a photo-dimerizable organic functional group provided at the entrances of the pores thereof, and a hexagonal mesoporous silica comprising a functional substance filled in the pores thereof and a dimerized organic functional group provided at the entrances of the pores to close the entrances. These hexagonal mesoporous silicas allow a substance incorporated therein to be controllably released. The present invention also provides a method of producing the mesoporous silica, and a method using the mesoporous silica to control the release of a functional substance incorporated therein.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: June 7, 2005
    Assignee: National Institute of Advanced Science and Technology
    Inventors: Masahiro Fujiwara, Nawal Kishor Mal, Yuko Tanaka
  • Patent number: 6902807
    Abstract: Diffractive pigment flakes are selectively aligned to form an image. In one embodiment, flakes having a magnetic layer are shaped to facilitate alignment in a magnetic field. In another embodiment, the flakes include a magnetically discontinuous layer. In a particular embodiment, deposition of nickel on a diffraction grating pattern produces magnetic needles along the grating pattern that allow magnetic alignment of the resulting diffractive pigment flakes. Color scans of test samples of magnetically aligned flakes show high differentiation between illumination parallel and perpendicular to the direction of alignment of the magnetic diffractive pigment flakes.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: June 7, 2005
    Assignee: Flex Products, Inc.
    Inventors: Alberto Argoitia, Vladimir P. Raksha, Dishuan Chu
  • Patent number: 6899948
    Abstract: A dental material comprising a hardenable resin and silica particles dispersed within the hardenable resin, wherein the silica particles have an average diameter of less than about 200 nm and are present in an amount greater than about 40 wt % of the weight of the dental material. The dental material may further comprise a heavy metal oxide. The dental material can be used as dental adhesives, artificial crowns, anterior or posterior fillings, casting materials, cavity liners, cements, coating compositions, mill blanks, orthodontic devices, restoratives, prostheses, and sealants.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: May 31, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Xiaodong Zhang, Brant Ulrick Kolb, Douglas Alan Hanggi, Bradley Dene Craig