Patents Examined by J. Reddick
  • Patent number: 4939203
    Abstract: A polyvinyl alcohol-aldehyde gel having a high water content and low degree of crosslinking is provided which has improved stability. The gel can be used to retard the flow of water in subterranean formations encountered in hydrocarbon production. One embodiment of the invention provides a method of forming the gel in-situ in the pores of subterranean zones thereby retarding or blocking the flow of water therein.This application is a continuation application of copending Ser. No. 027,723, filed Mar. 19, 1987, now abandoned which was a divisional application of Ser. No. 693,680, filed Jan. 22, 1985, now U.S. Pat. No. 4,664,194 which was a continuation-in-part application of Serial No. 514,557, filed Jul. 18, 1982, now U.S. Pat. No. 4,498,540 which issued Feb. 12, 1985.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: July 3, 1990
    Assignee: Cities Service Oil and Gas Corporation
    Inventor: Matthew L. Marrocco
  • Patent number: 4818794
    Abstract: Slightly crosslinked, water-soluble polymaleic acid which is obtainable by polymerization of maleic anyhdride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60 to 200.degree. C. in the presence of from 1 to 20% by weight, based on maleic anhydride, of a peroxyester, and hydrolysis of the polymer to give slightly crosslinked polymaleic acid having a Fikentscher K value of from 8 to 20 (measured at 20.degree. C. in 5% strength aqueous solution at pH 7 as the Na salt), a process for the preparation of slightly cross-linked polymaleic acid, and its use as a water treatment agent for reducing boiler scale and hard water deposits in water-conveying systems.
    Type: Grant
    Filed: September 10, 1987
    Date of Patent: April 4, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Heinrich Hartmann, Ulrich Goeckel, Felix Richter, Hans-Juergen Raubenheimer, Ekhard Winkler
  • Patent number: 4772663
    Abstract: A vinyl alcohol copolymer comprising the following general structure ##STR1## where R is hydrogen or methyl;R.sup.1 is a C.sub.6 -C.sub.18 hydrocarbyl group not containing an olefinic functionality;x is 70 to 99.5% mole %;y is 0 to 29.5 mole %; andz is 0.5 to 8 mole %.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: September 20, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Finn L. Marten, Amir Famili, Dillip K. Mohanty
  • Patent number: 4642249
    Abstract: The present invention provides a clear lacquer based on polyvinylidene fluoride which comprises:(a) 30 to 45 wt. % of polyvinylidene fluoride with a K value of 40 to 55,(b) 4 to 15 wt. % of an acrylate resin,(c) 33 to 50 wt. % of latent, high boiling solvent,(d) 3 to 15 wt. % of low boiling solvent,(e) 0.01 to 1.0 wt. % of flowing adjuvant,(f) 0.01 to 0.95 wt. % of light protection agent. The present invention also provides a process for coating metallic surfaces, wherein this clear lacquer is applied to a metal surface and stoved at a temperature of from 250.degree. to 350.degree. C.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: February 10, 1987
    Assignee: Solvay & Cie, Societe Anonyme
    Inventor: Werner Goll
  • Patent number: 4623683
    Abstract: An aqueous fabric finishing composition includes a solubilized polymer of from 40 to 51 mole percent of a mixture of higher one-alkenes and from 60 to 49 mole percent maleic anhydride.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: November 18, 1986
    Assignee: S.C. Johnson & Son, Inc.
    Inventors: John G. Villarreal, Calvin J. Verbrugge, Fred J. Reichley
  • Patent number: 4448908
    Abstract: What is disclosed is a latex, reactive with a biologically active substance to form a conjugate suitable for serological or immunological assay procedures, the particles of which latex comprises a polymer core and a shell thereover, said shell comprising a water insoluble monomer of the formula ##STR1## wherein R.sub.2 is H or CH.sub.3, n is 1 to 6, and R.sub.3 and R.sub.4 are alkyl, aryl, or same other group imparting water insolubility to said monomer.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: May 15, 1984
    Assignee: Behringwerke Aktiengesellschaft
    Inventors: Hans-Erwin Pauly, Wolfgang Kapmeyer, Ulrich Seitz
  • Patent number: 4443575
    Abstract: A composition for backing a carpet, which contains (a) 5 to 65% by weight of an olefin-polar monomer copolymer having a polar monomer content of 5 to 40% by weight, (b) 1 to 50% by weight of a synthetic oil comprising one or more non-condensed tricyclic aromatic hydrocarbon compounds having a boiling point of 250.degree. C. or higher and a molecular weight of 258 to 482, and being liquid at room temperature, (c) 30 to 90% by weight of an inorganic filler, and, if necessary, up to 50% by weight of a solid low-molecular compound component. The composition is particularly useful for automobile carpets and carpet tiles. The composition provides flexibility during blending, a high flexibility, and, in particular, a superior performance at low temperatures.
    Type: Grant
    Filed: October 26, 1982
    Date of Patent: April 17, 1984
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Sakuya Iwai, Teruo Kajikawa