Patents by Inventor Norma Valencia de Zapata

Norma Valencia de Zapata 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).

  • Stable synthetic material and method for preparing same
    Patent number: 6485702
    Abstract: A composition of matter is provided including an inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å and about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, the material having a void volume from the mesopore-sized channels of at least about 0.1 cc/g and a surface area of at least about 500 m2/g and having a number of hydroxyl groups of at least about 1.5 mmol of hydroxyl groups per gram of material, and exhibiting thermal and hydrothermal stability at temperatures up to about 500° C. Catalytic materials incorporating aluminum and other active metals, as well as a process for preparing the composition, are also disclosed.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: November 26, 2002
    Assignee: Intevep, S.A.
    Inventors: Juan Lujano, Jose Carrazza, Norma Valencia de Zapata
  • Stable synthetic material and method for preparing same
    Patent number: 6299855
    Abstract: A composition of matter is provided including an inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å and about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, the material having a void volume from the mesopore-sized channels of at least about 0.1 cc/g and a surface area of at least about 500 m2/g and having a number of hydroxyl groups of at least about 1.5 mmol of hydroxyl groups per gram of material, and exhibiting thermal and hydrothermal stability at temperatures up to about 500° C. Catalytic materials incorporating aluminum and other active metals, as well as a process for preparing the composition, are also disclosed.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: October 9, 2001
    Assignee: Intevep, S.A.
    Inventors: Juan Lujano, Jose Carrazza, Norma Valencia de Zapata
  • Stable synthetic material and method for preparing same
    Patent number: 6106802
    Abstract: A composition of matter is provided including an inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 .ANG. and about 100 .ANG. and a narrow diameter distribution of less than or equal to about 30 .ANG., the material having a void volume from the mesopore-sized channels of at least about 0.1 cc/g and a surface area of at least about 500 m.sup.2 /g and having a number of hydroxyl groups of at least about 1.5 mmol of hydroxyl groups per gram of material, and exhibiting thermal and hydrothermal stability at temperatures up to about 500.degree. C. Catalytic materials incorporating aluminum and other active metals, as well as a process for preparing the composition, are also disclosed.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 22, 2000
    Assignee: Intevep, S.A.
    Inventors: Juan Lujano, Jose Carrazza, Norma Valencia de Zapata