Patents Examined by T. Mosley
  • Patent number: 5574134
    Abstract: A water-resistant polyphenolic protein adhesive has been obtained from the Atlantic ribbed mussel, Geukensia (Modiolus) demissa. This protein provides a natural model for synthetic or bioengineered adhesives and is characterized by a Gly-Tyr-Lys or, more frequently, Gly-Dop-Lys "tail" fragment of a repeating octapeptide or nonapeptide unit. A complete octapeptide or nonapeptide unit (including both the 5- or 6-amino acid residue "head" as well as the 3-residue "tail") can be represented as follows:[Gln]Glu].sub.x -Thr/Ala-Gly-Dop/Tyr-Y.sup.1 -Y.sup.2 -Gly-Tyr/Dop-Lyswhere x is zero or one,Y.sup.1 is Val, Leu, Asp or Ser, andY.sup.2 is Ala, Pro, Hyp, or Leu.The tripeptide "tail" and/or the 5- or 6-residue "head" of the polypeptide is useful as a single unit (curable with difunctional crosslinkers or the like) or as a repeating unit.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: November 12, 1996
    Assignee: University of Delaware
    Inventor: J. Herbert Waite
  • Patent number: 5464725
    Abstract: After pads 2 for mounting parts are formed at desired positions on an insulating board 1 in a circuit forming process using etching resist 3, the etching resist 3 is left on the pads without peeling it off. A first photosolder resist 4 is then formed between the pads 2, exposed to light, and developing using a solvent able to separate the etching resist 3 as a developing liquid, following which the etching resist 3 is peeled off together with the not yet fully hardened first photosolder resist 4. After formation of the first photosolder resist 4, a second photosolder resist is formed on desired areas excluding the interspaces between the pads 2, exposed to light, and developed. Consequently, when a photosolder resist is formed between pads pitched at narrow intervals on a printed wiring board, attachment of the photosolder resist to the pads due to misalignment between the insulating board and a photo-mask can be avoided.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: November 7, 1995
    Assignee: NEC Corporation
    Inventors: Kiminori Ishido, Masahiro Yamaguchi
  • Patent number: 5464930
    Abstract: Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous introduction of a base at a rate to maintain a specific pH range and to produce a specific volume ratio of aqueous to organic phase. By this method, it is possible to employ a minimum amount of phosgene. The reaction may be conducted batchwise or continuously. The bischloroformate composition may be employed for the preparation of cyclic polycarbonate oligomers or linear polycarbonate, and linear polycarbonate formation may be integrated with bischloroformate composition formation in a batch or continuous process.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: November 7, 1995
    Assignee: General Electric Company
    Inventors: James M. Silva, Robert A. Pyles
  • Patent number: 5446124
    Abstract: The present invention provides an aromatic oligomer comprising repeating structural units represented by the following formula (I), which oligomer has a number-average degree of polymerization of 2 to 10 and a flow temperature of 100.degree. to 400.degree. C.; and a process for preparing the same: ##STR1## wherein X is selected from O and S; and Ar is selected from ##STR2## wherein R.sup.1 and R.sup.2 are each selected from alkyl group having 1 to 3 carbon atoms and phenyl group, and p and q are each an integer of 0 to 2.The aromatic oligomer of this invention is mixed or reacted with a polymeric substance such as thermoplastic resin, thermosetting resin and rubber to realize enhancement of performance and functional characteristics of the polymeric material.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: August 29, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masahiro Niwano, Kenji Manabe, Itaru Nitta, Kuniaki Asai, Makoto Namioka, Nobuko Nakayama
  • Patent number: 5434227
    Abstract: A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance containing iron in an amount of 50% by weight or less to contact the reactants. Also, a polycarbonate is produced by transesterification from a dihydroxy compound and a diester of carbonic acid in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof to contact the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: July 18, 1995
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tsutomu Yamato, Yasuhiro Oshino, Yutaka Fukuda, Tatsuya Kanno, Takaaki Kuwana, Yoshimichi Okano
  • Patent number: 5424367
    Abstract: Multiple sequential chemical reactions on a polymeric feedstock are carried out in an extruder with multiple reaction zones. Each reaction zone has means for introduction of reagents, for mixing of reagents with polymer and for removal of by/co-products or unreacted reagents.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: June 13, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Richard S. Auda, William M. Davis, David Y. Chung, Lawrence W. Flatley, Brenton G. Jones, Donald A. White, Hans G. Woudboer
  • Patent number: 5418314
    Abstract: In a process for producing a polycarbonate by subjecting a dihydroxy compound and a diester of carbonic acid to melt polycondensation through transesterification, after a polycarbonate prepolymer is prepared in the first-stage reaction, polycondensation is conducted as the second-stage reaction at a residence time in the range of from 15 to less than 60 min or through the use of at least one paddle-type self-cleaning twin-screw extruder.This process enables a colorless, transparent polycarbonate having a high molecular weight to be produced at a high efficiency on an industrial scale.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: May 23, 1995
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tsutomu Yamamoto, Yasuhiro Oshino, Yutaka Fukuda, Tatsuya Kanno, Takaaki Kuwana
  • Patent number: 5399656
    Abstract: An aromatic polyester superior in heat resistance and mechanical properties and satisfactory in lightness and color tone is provided. The aromatic polyester has resorcinol structure, has the formula (1), ##STR1## wherein R is halogen, C.sub.1 -C.sub.5 alkyl, or phenyl; m is an integer of 0 to 2, and when m is 2, the two substituents represented by R may be different from each other; and gives a powder fraction having a lightness (L value) of 70 or more and a red degree (a value) of 5 or less, which powder fraction is obtained by pulverizing the heat-resistant aromatic polyester, sieving the pulverized polyester by Tyler standard sieves and being allowed to pass through 60-mesh sieve but not 325-mesh sieve.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: March 21, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Itaru Nitta, Kuniaki Asai, Hiroshi Harada
  • Patent number: 5397673
    Abstract: Disclosed is a process for forming images which comprises applying a curable liquid to a first substrate in an image pattern, optionally transferring the curable liquid image to a second substrate, subsequently contacting the curable liquid image with a solid developer so that the developer adheres to the curable liquid image, optionally transferring the curable liquid and the solid developer in image pattern to a third substrate, and curing the curable liquid in the image pattern to a solid.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: March 14, 1995
    Assignee: Xerox Corporation
    Inventors: P. Keith Watson, Ian D. Morrison
  • Patent number: 5367044
    Abstract: A composition comprising a randomly branched aromatic polycarbonate polymer wherein the branching agent 1,1,1-tris-(4-hydroxyphenol)ethane is present in the polymer in quantities ranging from about 0.28 to about 0.36 mole percent compound based on the percent of dihydric phenol present in the polymer.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: November 22, 1994
    Assignee: General Electric Company
    Inventor: Niles R. Rosenquist
  • Patent number: 5364734
    Abstract: A positive-working radiation-sensitive mixture is disclosed that contains(a) a compound that forms strong acid on exposure to actinic radiation that is an ester of a sulfonic acid or sulfonic acids of the formula R--SO.sub.3 H or R'(--SO.sub.3 H).sub.2 with 2,4-bistrichloromethyl-6-(mono- or dihydroxyphenyl)-1,3,5-triazine of the formulae I and/or II: ##STR1## where R is an optionally further substituted (C.sub.1 -C.sub.10) alkyl, (C.sub.5 -C.sub.10)cycloalkyl, (C.sub.6 -C.sub.10)aryl, (C.sub.6 -C.sub.10)aryl- (C.sub.1 -C.sub.10) alkyl or (C.sub.3 -C.sub.9)heteroaryl radical, R' is an optionally substituted (C.sub.1 -C.sub.10)alkylene, (C.sub.6 -C.sub.10)arylene or (C.sub.3 -C.sub.9)heteroarylene radical, and n is 1 or 2,(b) a compound that contains at least one acid-cleavable C--O--C or C--O--Si bond, and(c) a water-insoluble polymeric binder that is soluble or at least swellable in aqueous alkaline solutions.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: November 15, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Georg Pawlowski, Horst Roeschert, Walter Spiess, Klaus-Juergen Przybilla
  • Patent number: 5362833
    Abstract: Toner fusing members coated with melamine-cured phenolic polysfloxanes compositions are obtained. Such a phenolic polysiloxane is obtained by hydride-addition of a hydride-substituted polysiloxane with an alkenyl substituted phenol.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: November 8, 1994
    Assignee: Eastman Kodak Company
    Inventors: Jiann H. Chen, Tsang J. Chen, Lawrence P. DeMejo
  • Patent number: 5357036
    Abstract: An organic surface-treating agent consisting of a compound which has a lipophilic linear backbone comprising carbon and hydrogen atoms; at least two side chains having an ester, ether, ketone or phenyl group on the backbone chain; a hydrophilic or reactive functional group on at least one molecular end; and a number average molecular weight of at least 300, which improves dispersibility of an inorganic material in an organic solvent when used as a surface-treating agent or a dispersant for the inorganic material.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: October 18, 1994
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Kazushi Miyata, Shoji Saibara, Tomohiro Harada
  • Patent number: 5356757
    Abstract: Disclosed are an immobilized enzyme film, characterized in that said film is formed using an enzyme solution prepared by adding 1 to 3 parts by weight of a 50 to 100 wt % water-soluble crosslinking agent having at least two epoxy groups in the molecule and 1 to 3 parts by weight of a 1 to 2 wt % glutaraldehyde to 1 to 3 parts by weight of a 10 to 50 wt % aqueous protein solution containing an enzyme, and a process for forming the same on an ion-sensitive field effect transistor. The thus formed immobilized enzyme film is of an uniform thickness and stable by virtue of its increased hydrophilicity and higher elasticity, whereby deactivation of the enzyme to be caused by the shrinkage of the film can be prevented.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: October 18, 1994
    Assignee: NEC Corporation
    Inventors: Kiseko Shionoya, Atsushi Saito
  • Patent number: 5357005
    Abstract: Method for treating surface of dielectric polymer with water vapor plasma to form reactive sites and grafting a reactive polymer thereto to tailor the properties of the dielectric polymer surface.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: October 18, 1994
    Assignee: International Business Machines Corporation
    Inventors: Stephen L. Buchwalter, Charles R. Davis, Ronald D. Goldblatt, Richard R. Thomas
  • Patent number: 5356941
    Abstract: A game ball core comprising a thermoplastic resin or blend of resins, a chemical blowing agent, a nucleating agent, peroxide crosslinking agent and other minor additives is disclosed. The molded cellular core is sufficiently durable to withstand a synthetic cover molding process at elevated temperatures.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: October 18, 1994
    Assignee: Lisco, Inc.
    Inventors: Michael J. Sullivan, Terence Melvin
  • Patent number: 5357027
    Abstract: Disclosed is a novel polycarbonate which has(1) a repeating unit (I) represented by the general formula: ##STR1## and a repeating unit (II) represented by the formula: ##STR2## (all the symbols are as defined in the claims); (2) a trihalogenophenoxy group as the end group thereof; and (3) a viscosity average molecular weight of 10,000 to 50,000, and 1 to 10 mol % of the repeating unit (I) in the main chain.The polycarbonate is excellent in all of flame retardance, impact resistance, and a thermostability at molding. Accordingly, the polycarbonate of the present invention is extensively and effectively used as various industrial materials such as home electric appliances, office automation devices, construction materials and the like.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: October 18, 1994
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventor: Takashi Komatsu
  • Patent number: 5348843
    Abstract: The invention is directed to an improved method for making a porcelain enamel tag or sign. The process involves forming a single white porcelain enamel base coat over a suitable metal backing, and firing to bond the porcelain enamel to the metal, resulting in the formation of a porcelain coated metal blank. The blank is then coated with a photographic emulsion which contains a colored frit. The emulsion coating is allowed to dry, and is then ready to receive a printed image. The desired image or graphic to be reproduced is formed on a light transmitting backing, which is made in the form of a print. The print is then affixed to the porcelain enamel blank which contains the emulsion overcoating. The blank containing the image on its surface is then exposed to a source of activating radiation. Following exposure, the image containing blank is developed in a warm aqueous solution, whereby the water serves to develop the emulsion mixture.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: September 20, 1994
    Assignee: Permar Systems, Inc.
    Inventors: Edward W. Beck, Blair M. Brewster, Andrew M. Walker
  • Patent number: 5344914
    Abstract: A new method for preparing commercially valuable polymeric ketones is described. The method employs an .alpha.-amiononitrile as a monomeric unit whereby an amorphous, soluble polymer having protected carbonyl moiety is obtained. Upon deprotecting the carbonyl moiety, a crystalline polymeric ketone is obtained. The method allows production of polymeric ketone materials having aromatic, aliphatic or mixed aromatic/aliphatic backbones.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: September 6, 1994
    Assignee: The Center for Innovative Technology*
    Inventors: Harry W. Gibson, Ashish Pandya
  • Patent number: 5342919
    Abstract: A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering (SLS) machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, the powder has a two-tier distribution in which substantially no primary particles has an average diameter greater than 180.mu.m, provided further that the number average ratio of particles smaller than 53.mu.m is greater than 80%, the remaining larger particles being in the size range from 53.mu.m to 180.mu.m. When the powder is a semicrystalline synthetic resin having a number average molecular weight in the range from about 30,000 to 500,000; a molecular weight distribution M.sub.w /M.sub.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: August 30, 1994
    Assignee: DTM Corporation
    Inventors: Elmer D. Dickens, Jr., Biing Lin Lee, Glenn A. Taylor, Angelo J. Magistro, Hendra Ng