Patents Examined by Ben Hsing
  • Patent number: 4725342
    Abstract: The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary alcohols and tertiary silanes with Hg and U.V. light is enhanced by refluxing the substrate in the irradiated reaction zone at a temperature at which the dimer product condenses and remains condensed promptly upon its formation. Cross-dimerization of the alkanes, ethers and silanes with primary alcohols is disclosed, as is the functionalization to aldehydes of the alkanes with carbon monoxide.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: February 16, 1988
    Assignee: Yale University
    Inventors: Robert H. Crabtree, Stephen H. Brown
  • Patent number: 4724062
    Abstract: A layer of electrically conductive polymers is applied by a process in which carbon fibers of filaments or sheet-like structures of carbon fibers or filaments are coated with sulfonic acids of phthalocyanines or porphyrins, the filaments treated in this manner are made the anode in a solution which contains monomers from the class consisting of the 5-membered heterocycles, and the monomers are anodically polymerized so that a conductive layer is formed on the fibers, filaments or sheet-like structures.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: February 9, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Naarmann, Franz Haaf, Gerhard Fahrbach
  • Patent number: 4718992
    Abstract: An aqueous electrolytic solution of a molybdate ion and an oxidizing agent is effective to detect phosphorus segregates in a metallic material, particularly cast steel through electrolysis. Segregated phosphorus can be detected by (a) applying a test sheet against a surface area of the metallic material to be examined for segregation, (b) introducing an aqueous electrolytic solution comprising 0.1 to 20% by weight of a molybdate ion and an oxidizing agent between the metallic material surface area and the sheet, (c) contacting a cathode plate with the sheet, (d) effecting electrolysis with the metallic material made anode, (e) removing the sheet from the metallic material surface, and (f) treating the sheet with a reducing agent.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: January 12, 1988
    Assignees: Kawasaki Steel Corporation, Kawasaki Steel Techno-Research Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya
  • Patent number: 4702816
    Abstract: An oxygen concentration detection system includes an oxygen sensor unit sensitive to oxygen in ambient oxygen-containing gases, an activating current supply operative to supply an activating current to the oxygen sensor unit. The oxygen sensor unit is responsive to the activating current and operative to produce a sensor signal voltage variable with the concentration of oxygen in the oxygen-containing gases. A reference signal generator produces a predetermined reference signal, the activating current supply means is responsive to the reference signal for producing the activating current. A current limiting circuit limits the oxygen concentration below a predetermined value which is variable with one of the activating current and the sensor signal voltage.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: October 27, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kenshiro Hashimoto, Yasushi Okada
  • Patent number: 4702814
    Abstract: An improvement in electrophoretic apparatus is provided for non-mechanical fluid transfer between the anode and cathode electrode containing chambers of the apparatus. Buffering fluid is transferred from one electrode containing chamber to the other via gas collecting means and a conduit which extends at a positive angle of include between the electrode containing chambers. By providing a constant and uniform rate of fluid transfer, a uniform pH value is maintained throughout the apparatus without use of mechanical pumps for the duration of the electrophoresis.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: October 27, 1987
    Assignee: Center for Blood Research
    Inventor: Zuheir L. Audeh
  • Patent number: 4689130
    Abstract: The higher chloroalkanes, advantageously the higher chloromethanes, are continuously produced from at least one lesser chloroalkane, by (i) continuously introducing chlorine and said at least one lesser chloroalkane into a stream of reaction medium continuously and essentially autogenously recirculating in a loop circuit which comprises an essentially vertical principal reaction zone, (ii) continuously chlorinating said at least one lesser chloroalkane in said essentially vertical principal reaction zone, and (iii) continuously withdrawing higher chloroalkane product from said stream of essentially autogenously recirculating reaction medium.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: August 25, 1987
    Assignee: ATOCHEM
    Inventor: Jean-Jacques Masini
  • Patent number: 4686024
    Abstract: The present invention relates to novel perfluoro chemicals (PFC), particularly perfluorocyclic ethers and polyfluorinated compounds containing a few chlorine atoms and to a method for the preparation thereof.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: August 11, 1987
    Assignee: The Green Cross Corporation
    Inventors: Kirby V. Scherer, Jr., Taizo Ono, Kouichi Yamanouchi, Kazumasa Yokoyama
  • Patent number: 4683039
    Abstract: Chlorine dioxide is transferred by membrane pervaporation from one chamber filled with aqueous chlorine dioxide-generating reactants or other chlorine dioxide donor medium across a gas-permeable hydrophobic membrane to a recipient aqueous medium filling a second chamber. The recipient medium may be water, pulp suspension or sodium chlorite solution. The membrane typically is expanded polytetrafluoroethylene.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: July 28, 1987
    Assignee: Tenneco Canada Inc. (ERCO division)
    Inventors: Zbigniew Twardowski, James D. McGilvery
  • Patent number: 4678553
    Abstract: A process is disclosed for recovering renatured polypeptides and proteins (collectively "polypeptides") from solution thereof and/or of their S-sulfonate derivatives (collectively "solution of polypeptides") in denaturants comprising:introducing said solution into a renaturant chamber (compartment, cell, space) of an electrodialysis ("ED") apparatus, said chamber bounded by membranes each of which is substantially permeable to low molecular weight singly charged ions of at least one charge sign and substantially impermeable to said polypeptides and S-sulfonate derivatives, said membranes separating said renaturant chamber from juxtaposed rinsing chambers on each side of the renaturant chamber;introducing rinsing solutions into said juxtaposed rinsing chambers, said rinsing solutions synergetically with said membranes facilitating a decrease in the chaotropism of said denaturant in said renaturant chamber when a direct electric current is imposed through said renaturant and rinsing chambers in series;applying
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: July 7, 1987
    Assignee: Ionics, Incorporated
    Inventors: Robert J. Mandle, Wayne A. McRae
  • Patent number: 4670112
    Abstract: p-Amino phenols of the formula ##STR1## wherein R.sub.1 nd R.sub.2 are independently hydrogen, optionally substituted alkyl, halogen, COOH, SO.sub.3 H or NO.sub.2, are produced by electrolytic reduction of p-phenylazophenols of the formula ##STR2## wherein R.sub.1 and R.sub.2 are as defined above, in an aqueous basic medium at a pH value at least equal to the pKa value of the p-phenylazophenol and at a temperature of at least 50.degree. C., preferably 70.degree. to 100.degree. C.The compounds (I) can hereby be produced without problems, in particular of an environmental nature, which are associated with the chemical reducing methods.The process is particularly useful for the preparation of the compound 5-aminosalicylic acid which is a valuable active component of certain medicaments for the treatment of colitis ulcerose and Crohn's disease.
    Type: Grant
    Filed: March 20, 1986
    Date of Patent: June 2, 1987
    Assignee: Farmaceutisk Laboratorium Ferring A/S
    Inventor: Henning Lund
  • Patent number: 4664764
    Abstract: Method, system and apparatus for carrying out the cathodic protection of structures wherein evaluation of true current and true voltages at the counter electrode is carried out by an integration procedure which is timed in conjunction with the cross-over times of the originating a.c. input to the power source. The system also may employ an IR drop free potential measurement of a variety employing a reference electrode and a control which periodically turns off the fluctuating current drive to the working electrode for purposes of carrying out potential measurement from the reference electrode. To improve performance of the system, as well as the true current measuring features, difference networks are used to develop the difference between the signals of one channel, i.e. ground, and the parallel channel, i.e. positive, leading to the working and reference electrodes. With the arrangement, spurious noise phenomena are cancelled.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: May 12, 1987
    Assignee: Floyd Bell Associates, Inc.
    Inventor: Ely S. Zofan