Patents by Inventor Paul A. Sanchez

Paul A. Sanchez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6462107
    Abstract: Compositions for forming polymeric layers useful in the manufacture printed wiring boards and other electrical interconnecting devices are disclosed. The compositions typically are processable in aqueous base and can be made photosensitive with the addition of a positive acting photosensitive compound. The compositions are particularly useful in the manufacture of laminable films used to make printed wiring boards. Multilayer printed wiring boards made using such films, and methods for making and using the films and boards, also are disclosed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 8, 2002
    Assignee: The Texas A&M University System
    Inventors: David P. Sinclair, Douglas E. Fjare, John T. Hoback, Terre L. VanKirk, Donald E. Rubis, David A. Wargowski, Wen-Feng Liu, Paul A. Sanchez
  • Patent number: 5183933
    Abstract: Provided is a continuous process for producing 2,6-naphthalenedicarboxylic acid by the liquid phase oxidation of 2,6-dimethylnaphthalene comprising continuously adding to a reaction zone the oxidation reaction components comprising 2,6-dimethylnaphthalene, a source of molecular oxygen, a solvent comprising an aliphatic monocarboxylic acid, and a catalyst comprising cobalt, manganese and bromine components, wherein the atom ratio of manganese to cobalt is about 5:1 to about 0.3:1, the total of cobalt and manganese is at least about 0.40 weight percent based on the weight of solvent, and maintaining the contents of the reaction zone at a temperature of about 370.degree. F. to about 420.degree. F. and at a pressure sufficient to maintain at least a portion of the monocarboxylic acid in the liquid phase thereby oxidizing the 2,6-dimethylnaphthalene to 2,6-naphthalenedicarboxylic acid.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: February 2, 1993
    Assignee: Amoco Corporation
    Inventors: Jon J. Harper, George E. Kuhlmann, Keith D. Larson, Rosemary F. McMahon, Paul A. Sanchez
  • Patent number: 5028737
    Abstract: An oxidation process is provided for converting dixylylpropane to isopropylidene bis(phthalic acid) in good yields with minimal by-product production, especially trimellitic acid production. The oxidation process employs an oxidation catalyst that includes zirconium as well as cobalt, manganese, and bromine.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: July 2, 1991
    Assignee: Amoco Corporation
    Inventor: Paul A. Sanchez
  • Patent number: 4950786
    Abstract: A method for making 2,6-naphthalene dicarboxylic acid by the oxidation of 2,6-diisopropylnaphthalene or its oxidation derivatives in the presence of a catalyst comprising cobalt, manganese, cerium and bromine components is disclosed.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: August 21, 1990
    Assignee: Amoco Corporation
    Inventors: Paul A. Sanchez, David A. Young, George E. Kuhlmann, Walter Partenheimer, Wayne P. Schammel
  • Patent number: 4670155
    Abstract: A process is provided in which an organic compound is separated from co-sorbed water directly on a particulate bed. Among the organic compounds which can be so separated and recovered from an aqueous solution are compounds containing the carboxylic group which can be converted to an ester during recovery. The inventive process may be used for the recovery of organic compounds from aqueous solutions such as fermentation broths.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: June 2, 1987
    Assignee: The Regents of the University of California
    Inventors: C. Judson King, Paul A. Sanchez