Abstract: A method for making expanded graphite from lamellar flake graphite comprising first providing lamellar flake graphite particles having at least a minimal purity, then intercalating the lamellar flake graphite particles with an expandable graphite intercalation compound, followed by expanding the graphite intercalation compound to exfoliate the flake graphite particles, and finally air milling the exfoliated flake graphite particles to further delaminate them.
Type:
Grant
Filed:
February 22, 1999
Date of Patent:
September 11, 2001
Assignee:
Superior Graphite Co.
Inventors:
Peter L. Zaleski, David J. Derwin, Richard J. Girkant
Abstract: In aluminum-based metal pigments produced by physical vapor deposition of a metal film and subsequent crushing of the metal film metal surfaces which are exposed after the operation of crushing the metal film and in particular fracture surfaces thereof are covered with a passivating protective layer to afford corrosion stability of those metal pigments.
Type:
Grant
Filed:
August 7, 1997
Date of Patent:
September 11, 2001
Assignee:
Eckart-Werke Standard Bronzepulver-Werke Carl Eckart GmbH
& Co.
Inventors:
Günter Kaupp, Werner Ostertag, Günter Sommer
Abstract: A novel lipid vesicle system is described. This system consists of a lipid shell that is anchored on the surface of a polymer matrix. The system has potential applications in drug delivery, drug targeting, protein separation, enzyme immobilization and blood cell substitution.
Type:
Grant
Filed:
October 17, 1997
Date of Patent:
September 4, 2001
Inventors:
Tuo Jin, Peter Pennefather, Ping I. Lee
Abstract: A nonhygroscopic thermally stable aluminum hydroxide, which is particularly useful for the preparation of thermally stable and fire retardant laminates for printed circuit boards.
Abstract: Multilayered particulate materials are formed by coating a particulate substrate with a metal and adsorbing an organic layer comprising a recognition moiety onto the metal film. The recognition moiety interacts with an analyte of interest allowing for its detection, purification, etc. Suitable recognition moieties can be selected from a range of species including, small molecules, polymers and biomolecules and the like. The novel particulate materials of the invention can be utilized in an array of methods including, ion-exchange, ion-selective ion-exchange, assays, affinity dialysis, size exclusion dialysis, as supports in solid phase synthesis, combinatorial synthesis and screening of compound libraries and the like.
Type:
Grant
Filed:
December 4, 1998
Date of Patent:
August 21, 2001
Assignee:
The Regents of the University of California
Inventors:
Nicholas Abbott, Pieter Stroeve, Timothy B. Dubrovsky, Zhizhong Hou
Abstract: An object of the invention is to prevent an oil from penetrating into a vessel obtained from expandable thermoplastic resin beads through molding.
The above object is achieved by expandable thermoplastic resin beads whose surface or surface layer is coated or incorporated with a fluorine-containing block copolymer comprising of a fluorine-containing vinyl-type polymer segment derived from a fluorine-containing vinyl-type monomer and a lipophilic vinyl-type polymer segment derived from a lipophilic vinyl-type monomer.
Abstract: To provide a substrate enclosed in a uniform nucleation layer, a substrate is nucleated with a noble metal salt where the noble metal salt is chemically bound to the substrate, and a method is described for binding a noble metal salt chemically to a substrate. To provide a metal plated powder, a powder is nucleated with a noble metal salt and the nucleation is coated with a metal layer. A method is also provided for nucleating the powder surface with a noble metal salt in such a manner that it is chemically bound to the substrate and then metal plated by a conventional electroless method.
Type:
Grant
Filed:
June 14, 1999
Date of Patent:
August 14, 2001
Assignee:
Robert Bosch GmbH
Inventors:
Lothar Weber, Thomas Brinz, Ulrich Eisele, Dorothee Kling
Abstract: There is disclosed a water-reducible, chrome-free coating composition for providing corrosion protection to a substrate, such as a metal substrate. The deposited coating film is corrosion-resistant and, for coated articles which are threaded, e.g., steel fasteners, the coating provides a non-thread-filling coating. The coating composition contains particulate metal, such as particulate zinc or aluminum. Although substituents can be separately packaged, the composition is virtually always a one-package coating composition. The composition is water-based, while also containing low-boiling organic liquid. The composition also contains water-reducible organofunctional silane, particularly an epoxy functional silane, as a binding agent. The composition has highly desirable, extended shelf life. The composition can be easily applied in usual manner, such as dip-drain or dip-spin technique, and readily cures at elevated temperature.
Type:
Grant
Filed:
August 2, 1999
Date of Patent:
August 7, 2001
Assignee:
Metal Coatings International Inc.
Inventors:
Donald J. Guhde, Terry E. Dorsett, Etienne Maze, Victor V. Germano, Walter H. Gunn
Abstract: Barium titanate-based particles having a coating comprising an oxide, hydrous oxide, hydroxide or organic acid salt of a metal other than barium or titanium, wherein at least 90 percent of said particles have a particle size less than 0.9 micrometer when said particles are dispersed by high shear mixing, useful in the fabrication of thin, fine-grained dielectric layers for multilayer ceramic capacitors with high breakdown voltage.
Type:
Grant
Filed:
September 4, 1997
Date of Patent:
July 31, 2001
Assignee:
Cabot Corporation
Inventors:
Stephen A. Costantino, Robert A. Hard, Sridhar Venigalla
Abstract: A novel method is provided for joining substrates made of aluminum nitride series ceramics to each other, which can perform the joining substantially without leaving an intervening third phase other than aluminum nitride series ceramics at the joining interface of the substrates. The method is performed, for example, by providing a joining agent 3 containing at least an aluminum nitride series ceramics and a flux between the substrates 1 and 2, heat treating the joining agent to eutectically melt the aluminum nitride series ceramics and the flux, then precipitating a reprecipitated phase of the aluminum nitride series ceramics at the joining interface of the substrates.
Abstract: A writable matte article comprising a water-absorbing layer coated on a substrate. The water absorbing layer is a unique blend of a crosslinked, water absorbing polymer particle, a water insoluble binder polymer with good adhesion to the film, and optionally, inert organic or inorganic particles that impart a matte finish to the coating. Advantageously, drying times of these inks using the present invention is reduced from about 10 minutes to 10 seconds. Preferred films are polyester and polyolefin-based films.
Type:
Grant
Filed:
August 27, 1997
Date of Patent:
June 26, 2001
Assignee:
3M Innovative Properties Company
Inventors:
Frederick John Gustafson, Kevin Mark Hamer, Ramesh Chand Kumar
Abstract: A composition and devices utilizing these compositions for providing protection against electrical overstress including a matrix formed of a mixture of an insulating binder, conductive particles having an average particle size of less than 10 microns, and semiconductive particles having an average particle size of less than 10 microns. The compositions exhibit improved clamping voltages in a range of about 30 volts to greater than 2,000 volts.
Abstract: A method for producing a mineral filler and pozzolan product from fly ash is provided in which fly ash is dry processed in an air classifier to obtain a fine fraction having an average particle size of from about 0.1 to 5 microns and a coarse fraction having an average particle size of from about 6 to 20 microns. The fine fraction is then preferably passed through a magnetic separator to remove ferrous iron oxides and may optionally be treated with a surface modifier to form a mineral filler. The coarse fraction is preferably passed through a 100 mesh screen to form a pozzolan product.
Type:
Grant
Filed:
July 19, 1999
Date of Patent:
June 5, 2001
Assignee:
Mineral Resources Technologies, LLC
Inventors:
Robert William Styron, Kamal Seyi Abiodun
Abstract: An interior fixture or fitting part for vehicles, particularly motor vehicles, comprising a rigid molded support part (2), a layer of knitted spacer fabric (3) or formed fabric disposed on a surface of the molded support part (2) and a layer of natural leather (4) on the knitted spacer fabric (3) or formed fabric as well as a first adhesive layer (5) between molded support part (2) and knitted spacer fabric (3) or formed fabric and a second adhesive layer (6) between knitted spacer fabric (3) or formed fabric and natural-leather layer (4). An associated production method is also proposed.
Type:
Grant
Filed:
December 22, 1997
Date of Patent:
May 15, 2001
Assignee:
Eldra Kunststofftechnik GmbH
Inventors:
Rudolf Aichner, Hermann Böckel, Roland Friedberger
Abstract: A carbon-coated titania powder containing titanium nitride in which at least part of the surface of the titania powder containing titanium nitride is coated with carbon.
Abstract: The invention is directed to the preparation of magnetic and non-magnetic particles coated with a polyaldehyde dextran material and a process for making the same. The polyaldehyde dextran coated particles of the invention are suitable for use in immunological assays and exhibit a reduced matrix effect in such assays when compared to convention particles without a polyaldehyde dextran coating.
Abstract: A composite material is composed of a matrix and dispersed components which form a discontinuous three-dimensional network structure in the matrix. It permits the dispersed components to fully exhibit the characteristic properties without any loss of mechanical properties. A process for producing the above-mentioned composite material includes preparing a raw material powder such that granules of desired shape for the matrix are discontinuously covered with components of desired shape for the dispersed phase, molding the raw material powder into a desired shape, and heating the molded article.
Abstract: A fine powder of hydrophobic titanium oxide, which, when added to toner powder, gives it high flowability and good electrification stability. The titanium oxide is prepared by hydrolyzing a volatile titanium compound while in a high-temperature vapor-phase condition, in the presence of a combustible or incombustible gas, and has a BET specific surface area of from 55 to 150 m2/g and an anatase/rutile crystal structure with a ratio of anatase falling between 0.3 and 0.98. It is processed for surface modification with a silane coupling agent and/or a silicone compound to produce a fine powder of hydrophobic titanium oxide.
Abstract: Aggregated absorbent particles having a shape similar to an ellipsoid, which has a first axis (A—A) of length (a), a second axis (B—B) of length (b) and a third axis (C—C) of length (c), the first, second and third axes being orthogonal. The lengths of the first, second and third axes are such that: a>b≧c, and the ratio (a/b) of the length (a) of the first axis (A—A) to the length (b) of the second axis (B—B) is such that: 1.05<a/b<2.50. These aggregated absorbent particles are used in a gas production unit, in particular a PSA unit with radial geometry, for implementing a process of separating a gas flow, such as air or a syngas, with a view to producing, in particular, oxygen with a purity of at least 90%, hydrogen or purified air which can subsequently be separated by cryogenic distillation.
Type:
Grant
Filed:
December 18, 1998
Date of Patent:
April 24, 2001
Assignee:
L'Air Liquide, Societe Anonyme pour l'Etude et Exploitation
des Procedes Georges Claude
Abstract: Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are useful for absorbing liquids spilled on the floor, and are crushable when walked on to provide greater resistance to slipping, and yet have a high resistance to attrition.
Type:
Grant
Filed:
July 20, 1999
Date of Patent:
April 10, 2001
Assignee:
Marcel Paper Mills, Inc.
Inventors:
Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer