Patents by Inventor Leticia Menchaca

Leticia Menchaca 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).

  • Thin film intrauterine device
    Publication number: 20060213522
    Abstract: Contraceptive intrauterine devices made of thin film shape memory alloy materials. The devices are formed in three-dimensional shapes which contact uterus tissue of a human or other mammal to prevent conception. In certain embodiments, structural features such as tails, fenestrations, ridges or grooves are formed on the devices to enhance the contraceptive effect.
    Type: Application
    Filed: March 30, 2006
    Publication date: September 28, 2006
    Inventors: Leticia Menchaca, A. Johnson, Vikas Gupta, Valery Martynov
  • Thin film intrauterine device
    Patent number: 7040323
    Abstract: Contraceptive intrauterine devices made of thin film shape memory alloy materials. The devices are formed in three-dimensional shapes which contact uterus tissue of a human or other mammal to prevent conception. In certain embodiments, structural features such as tails, fenestrations, ridges or grooves are formed on the devices to enhance the contraceptive effect.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: May 9, 2006
    Assignee: Tini Alloy Company
    Inventors: Leticia Menchaca, A. David Johnson, Vikas Gupta, Valery Martynov
  • Method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H (tritium) concentrations of xylem waters and subsurface waters using time series sampling
    Patent number: 5979228
    Abstract: A method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H concentrations of xylem and subsurface waters using time series sampling, insulating sampling chambers, and combined .sup.18 O/.sup.16 O, .sup.2 H/.sup.1 H and .sup.3 H concentration data on transpired water. The method involves collecting water samples transpired from living plants and correcting the measured isotopic compositions of oxygen (.sup.18 O/.sup.16 O) and hydrogen (.sup.2 H/.sup.1 H and/or .sup.3 H concentrations) to account for evaporative isotopic fractionation in the leafy material of the plant.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 9, 1999
    Inventors: Brian Smith, Leticia Menchaca