Patents Examined by E. Rollins Buffalow
  • Patent number: 5916972
    Abstract: Disclosed are mixtures of two or more polymers of which at least one is cross-linked. Interpenetrating polymer networks are on hand. The polymers mix below a certain temperature and demix above this temperature (LCST behavior). Below the demixing temperature, such interpenetrating polymer networks are optically clear, above the demixing temperature they are milky, turbid and have reduced light transmission due to the light scattering of the phaseseparated system' if the refractive indices of the components do not coincide. The demixing process is fully reversible below the demixing temperature.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: June 29, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Eck, Hans-Joachim Cantow, Volker Wittwer
  • Patent number: 5883159
    Abstract: A glass-fiber-reinforced polypropylene resin composition is provided having:(A) at least one polypropylene resin,(B) resin-coated glass fiber obtained by previous coating glass fiber with a thermoplastic resin, and(C) glass fiber, whereinthe total content of the resins in the components (A) and (B), respectively, being 65 to 95% by weight based on the total weight of the components (A), (B) and (C),the total content (G) of the glass fibers in the components (B) and (C) being 5 to 35% by weight based on the total weight of the components (A), (B) and (C), andthe melt flow rate M (g/10 min) of the polypropylene resin as component (A) and the above-mentioned total glass fiber content G (% by weight) satisfies the relationship:M<1000/G.The reinforced polypropylene resin composition provides a resin molded article having only small protuberances of welds, and a wheel cover having an excellent appearance quality and mechanical properties.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: March 16, 1999
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Junji Koizumi, Haruyasu Mizutani
  • Patent number: 5865927
    Abstract: Hot melt adhesive masses are provided with a tackless surface by a process which comprises the steps of: a) extruding the hot melt adhesive through an appropriate die orifice; b) spraying the surface of the extruded adhesive with a molten film forming low molecular weight polymer or formulated polymeric material, the material being selected so that it will not appreciably detract from the properties of the adhesive composition when remelted therewith; c) heating the surface of the coated adhesive at a temperature and for a period of time sufficient to re-melt the film forming polymer so as to form a continuous coating thereof yet insufficient to appreciably melt the adhesive; and d) cooling the thus coated adhesive mass to a temperature suitable for handling.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: February 2, 1999
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Paul Puletti, Stephen Hatfield
  • Patent number: 5853887
    Abstract: The improved white conductive powder comprises white inorganic pigment particles the surfaces of which are coated with an electrically conductive layer of a dual structure consisting of a lower tin dioxide sub-layer and an upper tin dioxide-containing indium oxide sub-layer. To produce the powder, the hydration product of tin is deposited uniformly on the surfaces of white inorganic particles and, subsequently, an overcoat of indium oxide hydrate containing 0.1-20 wt % of tin dioxide is formed, followed by a heat treatment that is conducted at C. in a non-oxidizing atmosphere.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: December 29, 1998
    Assignee: Titan Kogo Kabushiki Kaisha
    Inventors: Akihiro Yoshimoto, Toshihiro Yoshinaga, Shigeru Nagaoka, Masayasu Morishita
  • Patent number: 5849127
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/.alpha.-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/.alpha.-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an oxygen transmission rate of from about 500 to 50,000 cc/m.sup.2 /24 hr STP. Also disclosed are a process for making the film, a packaging process using the film, and a product packaged in the film. The film is especially suitable for the packaging of oxygen sensitive products, such as lettuce, and exhibits exceptional hot tack seal strength.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: December 15, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Betsy P. Kuo
  • Patent number: 5840381
    Abstract: A laminate sheet having excellent corrosion-inhibiting effects and physical strength, which sheet is useful in packing metal products subjected to influence of changes in outside temperature and humidity, and which sheet is comprised of an inner layer made of a thermoplastic resin containing water-soluble glass powder and optionally a vapor phase corrosion inhibitor, a middle layer made of a thermoplastic resin containing inorganic metal salt corrosion inhibitor(s), and an outer layer made of a barrier resin with excellent barrier properties against outside air and against ultraviolet rays.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: November 24, 1998
    Assignee: Aicello Chemical Co., Ltd.
    Inventor: Ryochi Ohtsuka
  • Patent number: 5837744
    Abstract: Polyoxymethylene articles having a surface printable with an ultraviolet-curing ink are obtained by molding a polyoxymethylene and treating the molded article by ultraviolet irradiation, corona discharge, or electron-beam radiation until the surface has an X-ray photoelectron spectrum in which the ratio of the ?C--O!.sub.n bond peak at 302 eV to the C--C bond peak at 305 eV, i.e., the ?C--O!.sub.n bond peak/C--C bond peak ratio, is at least 2.5.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 17, 1998
    Assignee: TDK Corporation
    Inventors: Naoyuki Nagashima, Hitoshi Azegami, Yasufumi Takasugi
  • Patent number: 5837358
    Abstract: A packaged product has a cooked meat product, within a film, adhered to a meat-contact surface of the film. An anhydride functionality is present on the meat-contact surface of the film. Upon extraction in ethanol, the anhydride is extractable from the cook-in film to a level of less than 50 parts per billion. A packaged product is prepared by packaging a meat product in the cook-in film and cooking the meat product within the film so that the meat-contact surface of the film adheres to the meat product.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: November 17, 1998
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Frank T. Bauer, Thomas D. Kennedy, Ram K. Ramesh, Paul J. Satterwhite, John S. Sczesny, G. Vincent Sharps, Richard K. Watson
  • Patent number: 5820997
    Abstract: A decorative, high-pressure laminate produced with a sorbitol-modified melamine-formaldehyde resin and methods of making high-pressure laminates.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: October 13, 1998
    Assignee: Georgia-Pacific Resins, Inc.
    Inventors: Ben Gapud, Mark Peters
  • Patent number: 5789029
    Abstract: Multilayer thermoplastic stretch wrap film having substantial one-sided cling properties is made without the use of polymers with high levels of n-hexane extractables, dissimilar polymer chemistries, or low molecular weight tackifiers. The reverse or cling layer comprises at least one homogeneously branched ethylene polymer composition having a density of about 0.90 g/cc or less and the obverse or non-cling layer comprises an propylene or ethylene polymer composition having a density greater than 0.90 g/cc. The multilayer film is particularly useful for load palletization end-use applications.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: August 4, 1998
    Assignee: The Dow Chemical Company
    Inventors: David B. Ramsey, Kenneth B. Stewart
  • Patent number: 5782254
    Abstract: A method of producing a recyclable image recording support material including a paper layer capable of copying or recording images thereon is conducted by the steps of applying to an image-bearable side of an image recording support material including a paper layer an aqueous coating liquid selected from the group consisting of an aqueous surfactant solution, an aqueous water-soluble polymer solution, and a mixture of the aqueous surfactant solution and the aqueous water-soluble polymer solution, in an extremely small amount; removing images, if any, from the image-bearable side of the image recording support material by bringing an image releasing member into contact with the image-bearable side of the image recording support material under application of heat and pressure thereto; and drying the image recording support material. An image recording support material is produced by the above method. A method of recyling an image recording support material, based on the above method, is also conducted.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: July 21, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyoshi Tanikawa, Tadashi Saito, Shigeru Fujita, Kakuji Murakami, Mitsuru Ohminato
  • Patent number: 5783269
    Abstract: Non-PVC multi-layer film (1) containing an outer layer (2), a supporting layer (4) together with at least one interposed central layer (3), characterized in that the outer (2) and supporting (4) layers contain polymers having Vicat softening temperatures of above approximately C. and that at least one central layer (3) contains polymers having softening temperatures of below approximately C. The non-PVC multi-layer film (1) is particularly suitable for the production of medical bags, in particular multi-chamber bags, as the materials of the individual layers (2-4) are selected in such a manner that the film is transparent and flexible, but in particular also heat-sterilizable, fusible and heat sealable. The film is moreover completely recyclable.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: July 21, 1998
    Assignee: Fresenius AG
    Inventors: Klaus Heilmann, Thomas Nicola, Thomas Kreischer
  • Patent number: 5773154
    Abstract: An article such as fishing tackle or the like, is provided with an exterior surface which has high strength so that any cracking or separation hardly occurs, has high durability, is light in weight and is decorated to have an aesthetically pleasing appearance. The exterior surface is formed with a synthetic resin coating layer, a thin decorative layer formed through physical vapor deposition with metal, and a transparent or semi-transparent protective layer.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: June 30, 1998
    Assignee: Daiwa Seiko, Inc.
    Inventor: Nobuhiro Takada
  • Patent number: 5770318
    Abstract: Compositions comprising a blend of a MPEP (metallocene catalyzed polyethylene plastomer) and a MPEE (metallocene catalyzed olefin copolymer elastomer); self-adhering film materials made from a blend of these metallocene polymers; and methods of making these self-adhering film materials which are useful for sealing and wrapping applications.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: June 23, 1998
    Assignee: Norton Performance Plastics Corporation
    Inventor: Michael Friedman
  • Patent number: 5766772
    Abstract: A multi-layer heat-shrinkable film endowed with high anti-fog properties, and having a barrier layer (1), an adhesive layer (2, 2'), and an adhesive layer (3, 3'), wherein at least one external layer (3, 3') is made of a polyolefinic polymer. Said anti-fog properties are obtained by incorporating in said film from 1 to 5% by weight of a composition comprising (i) a glycerol mono-ester of a saturated or unsaturated fatty acid having from 8 to 20 carbons, (ii) a glycerol di-ester of a saturated or unsaturated fatty acid having from 8 to 20 carbons, and (iii at least one polyoxyethylene ether of a fatty alcohol having from 8 to 20 carbons.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: June 16, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Paolo Ciocca, Livio Buongiorno, Serge Bax
  • Patent number: 5766744
    Abstract: Multilayered film and film based assembly which are environmentally-compatible, and which exhibit one or more desirable characteristics of polyvinyl chloride (PVC) film and film based assemblies, such as clarity, flexibility and toughness, but without the environmental and health hazards associated with PVC materials, are provided. Also provided is a method of preparing such film and film based assembly.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: June 16, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dan L. Fanselow, Raymond L. Fergusen, Walton J. Hammar, Lester B. Odegaard
  • Patent number: 5763095
    Abstract: The present invention relates to a film material suitable for using in packaging oxygen sensitive products which emit carbon dioxide gas, such as high gassing cheeses. The multilayer film includes at least one layer containing a nylon copolymer, preferably a nylon terpolymer, having at least one aromatic comonomer comprising from about 10% to about 75% by weight of the copolymer. The resultant film material is characterized by a relatively high CO.sub.2 :O.sub.2 transmission ratio; and a CO.sub.2 transmission rate of at least 400 cc/m.sup.2 -day-atmosphere.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: June 9, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ram K. Ramesh, Gautam P. Shah
  • Patent number: 5759676
    Abstract: The present invention is directed towards a multi-layer golf ball which comprises a core with one or more layers; at least one cover layer; and one or more mantle layers disposed between the core and cover layer, wherein the mantle layer comprises thermoplastic polyetherester, thermoplastic polyesterester dynamically vulcanized thermoplastic elastomer, functionalized styrene-butadiene elastomer, thermoplastic polyurethane, metallocene polymer or blends thereof and thermoset materials. Further, the present invention is directed to a ball having a core, a coverlayer and a mantle layer therebetween wherein the mantle layer has a flex modulus of less than 10,000 psi and the cover has a flex modulus greater than 80,000 psi.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: June 2, 1998
    Assignee: Acushnet Company
    Inventors: Christopher Cavallaro, Murali Rajagopalan, Samuel A. Pasqua, Jr., Herbert C. Boehm, Kevin M. Harris
  • Patent number: 5760135
    Abstract: This invention relates to a novel pressure sensitive adhesive formed of a liquid and solid rubber which is substantially resin free. Preferably the adhesive is formed of a weight ratio of solid rubber to liquid rubber of about 1:0.5 to about 1:7. When a thermoplastic rubber is used, an endblock associating resin can also be used with the block copolymer solid rubber composition for improving adhesion and hold properties of the composition. A minor amount of tackifier can be added without affecting the improved properties of the present invention. The adhesive can preferably be cross linked with a sulfur, sulfur-bearing agents, peroxide, isocyanate or an aluminum isopropylate composition. These adhesives exhibit improved adhesion in cold weather and oily surface applications and other properties. The pressure sensitive adhesives can be used in health care, industrial and drug delivery systems. The adhesives can be processed by a hot melt process for providing improved ecological benefits.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: June 2, 1998
    Assignee: Ralf Korpman Associates, Inc.
    Inventors: Ralf Korpman, Vera Korpman, Michael Korpman, Dennis Korpman
  • Patent number: 5756185
    Abstract: A gluable fixing element for holding structural or functional components to essentially flat surfaces of carrier parts. It consists of a bonding portion for producing an adhesive bond with the surface of the carrier part and at least one further holding portion for producing a positive or non-positive connection with the component. The bonding portion has a bonding surface which is provided with a curable and/or crosslinkable, reactive hot-melt adhesive that when dry is wear-resistant and non-adhesive at temperatures up to C. but that can be reactivated within a very short time when heated by thermal or other energy to a temperature sufficient to melt the adhesive to produce a durable adhesive bond between the element and the carrier parts.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: May 26, 1998
    Assignee: A. Raymond & GmbH & Co. KG
    Inventor: Hans-Jurgen Lesser