Patents Examined by Elizabeth Irzinski
  • Patent number: 4820674
    Abstract: A process for preparing a hydrosilylation catalyst by dissolving chloroplatinic acid H.sub.2 PtCl.sub.6 in a cyclic ether or cyclic ester containing at least 3 carbon atoms, and maintaining the resulting solution at a temperature of at least 30.degree. C.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: April 11, 1989
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Kouji Shiozawa, Yoshiharu Okumura, Chihiro Imai, Nobukazu Okamoto
  • Patent number: 4808407
    Abstract: An improved process for preparing water-soluble copper salts of carboxylic acids is described. More particularly, the improved process comprises the steps of(A) providing a mixture comprising(A-1) as a copper source, copper metal, a copper oxide or mixtures thereof,(A-2) at least one organic monocarboxylic acid containing about 10 to about 30 carbon atoms,(A-3) at least one alkanolamine compound characterized by the formulaR.sub.1 (R.sub.2)NHwherein R.sub.1 is a hydroxyalkyl group and R.sub.2 may be hydrogen or a hydroxyalkyl group, and(A-4) water,(B) treating the mixture with oxygen at a temperature up to about the reflux temperature of the mixture until the desired water-soluble copper salt is obtained, and(C) recovering the copper salt as an aqueous solution.The mixture (A) can be modified to include one or more dyes to produce colored solutions of the water-soluble metal salts.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: February 28, 1989
    Assignee: Mooney Chemicals, Inc.
    Inventors: Richard W. Hein, Anthony Alkaitis, deceased
  • Patent number: 4801749
    Abstract: Phenolic antioxidant hydrazides are provided which are useful to stabilize organic materials (such as synthetic polymers) which are subject to oxidative degradation.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: January 31, 1989
    Assignee: Pennwalt Corporation
    Inventors: Robert T. Kazmierczak, Ronald E. MacLeay, Jerome Wicher
  • Patent number: 4795847
    Abstract: A process for the preparation of 2,6-dialkyl-naphthalenes comprising selectively alkylating naphthalene or 2-alkyl-naphthalene with alkylating agent in the presence of a zeolite catalyst at 250.degree. to 345.degree. C. which dialkyl-naphthalenes are useful for the preparation of naphthalene 2,6-dicarboxylic acid used to produce high-quality polyesters or polyamides.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: January 3, 1989
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Jens Weitkamp, Marita Neuber, Wilhelm Holtmann, Gerd Collin, Hans Spengler