Patents by Inventor Robert Lancto

Robert Lancto 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).

  • Electronically graded multilayer ferroelectric composites
    Patent number: 5693429
    Abstract: A laminated ceramic ferroelectric material has adjacent layers of Barium ontium Titanate (BSTO)--oxide composite stacked in order of descending oxide content and sized in thickness to produce a generally equal capacitance across each layer, resulting in a material having a graded dielectric constant for use in phased array antenna, for example. The oxides are from the metallic oxide group consisting of alumina, zirconia and magnesia and the layers are produced by tape casting.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: December 2, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Louise C. Sengupta, Eric Ngo, Michelina E. O'Day, Steven Stowell, Robert Lancto, Somnath Sengupta, Thomas V. Hynes
  • Ceramic ferroelectric composite material - BSTO-ZrO.sub.2
    Patent number: 5486491
    Abstract: A novel ceramic ferroelectric material having a low dielectric constant, loss and high tunability. The material is a composite comprising Barium Strontium Titanate (BSTO) and a ceramic material having a low dielectric constant. The preferred composite is represented by Ba.sub.1-x Sr.sub.x TiO.sub.3 --ZrO.sub.2, wherein x is greater than 0.00, but less than or equal to 0.70, and wherein the percent weight ratio between Ba.sub.1-x Sr.sub.x TiO.sub.3 and ZrO.sub.2 ranges from approximately 99%-40% and 1%-60%, respectively. The novel materials possess superior electronic properties; and they may be employed in various antenna systems.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: January 23, 1996
    Assignee: The United States of America as represented by The Secretary of the Army
    Inventors: Louise Sengupta, Eric Ngo, Steven Stowell, Michelina O'Day, Robert Lancto
  • Ceramic ferroelectric composite material - BSTO-MgO
    Patent number: 5427988
    Abstract: A novel ceramic ferroelectric material having a low dielectric constant, extremely low loss and high tunability. The material is a composite comprising Barium Strontium Titanate (BSTO) and a ceramic material having a low dielectric constant. The preferred composite is represented by Ba.sub.1-x Sr.sub.x TiO.sub.3 --MgO, wherein x is greater than 0.00, but less than or equal to 0.75, and wherein the percent weight ratio between Ba.sub.1-x Sr.sub.x TiO.sub.3 and MgO ranges from approximately 99%-40% and 1%-60%, respectively. The novel materials possess superior electronic properties; and they may be employed in various antenna systems at both microwave and millimeter wave range frequencies.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: June 27, 1995
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Louise Sengupta, Eric Ngo, Steven Stowell, Michelina O'Day, Robert Lancto
  • Ceramic ferroelectric material
    Patent number: 5312790
    Abstract: A novel ceramic ferroelectric material having a low dielectric constant, loss and high tunability. The material is a composite comprising Barium Strontium Titanate (BSTO) and a ceramic material having a low dielectric constant. The preferred composite is represented by Ba.sub.1-x Sr.sub.x TiO.sub.3 -Al.sub.2 O.sub.3, wherein x is greater than 0.00, but less than or equal to 0.70, and wherein the percent weight ratio between Ba.sub.1-x Sr.sub.x TiO.sub.3 and Al.sub.2 O.sub.3 ranges from approximately 99%-40% and 1%-60%, respectively. The novel materials possess superior electronic properties; and they may be employed in various antenna systems.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: May 17, 1994
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Louise C. Sengupta, Eric Ngo, Steven Stowell, Gary Gilde, Robert Lancto