Patents by Inventor Ali SAYIR

Ali SAYIR 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).

  • Systems, methods and apparatus for fabricating and utilizing a cathode
    Patent number: 11749486
    Abstract: Systems, methods and apparatus related to a method for constructing a field emission device. The method includes providing a metal cathode substrate; shaping a carbon fiber fabric into a pattern, creating a patterned carbon fiber fabric; and brazing at least a portion of the patterned carbon fiber fabric to the metal cathode substrate.
    Type: Grant
    Filed: June 1, 2022
    Date of Patent: September 5, 2023
    Inventors: Brad Winston Hoff, Wilkin Wai-Hang Tang, Sterling Ryan Beeson, Ali Sayir
  • Systems, methods and apparatus for fabricating and utilizing a cathode
    Patent number: 11373833
    Abstract: Systems, methods and apparatus related to a method for constructing a field emission device. The method includes providing a metal cathode substrate; shaping a carbon fiber fabric into a pattern, creating a patterned carbon fiber fabric; and brazing at least a portion of the patterned carbon fiber fabric to the metal cathode substrate.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: June 28, 2022
    Assignee: Government of the United States, as Represented by the Secretary of the Air Force
    Inventors: Brad Winston Hoff, Wilkin Wai-Hang Tang, Sterling Ryan Beeson, Ali Sayir
  • Multi-phase ceramic system
    Patent number: 10501373
    Abstract: Systems, methods, and other embodiments associated with multi-phase ceramic composites are described herein. Specifically, a multi-phase ceramic composite having a microstructure having at least one solid-state lubricant phase and at least one wear resistant material phase.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 10, 2019
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Frederick Dynys, Ali Sayir
  • High temperature piezoelectric ceramics
    Patent number: 8518291
    Abstract: Piezoelectric ceramics that can be used in high temperature actuators. The piezoelectric ceramics have various desirable properties, for example the materials do not depole up to about 400° C. and have large piezoelectric coefficients >400 pm/V. In addition the thickness mode electromechanical coupling coefficient is large, increasing from 0.5 to 0.65 with temperature. The planar electromechanical coefficient is around 0.40 and does not show a significant dependence on temperature. These materials are highly polarizable with remnant polarization around 50 ?C/cm2 and are electrically hard with coercive field above 20 kV/cm. They exhibit single crystal like ferroelectric behavior with square hysteresis loops. Such properties make these materials a piezoelectric ceramic that can be used in stack actuators at high temperatures. Methods for preparing the piezoelectric ceramics are also disclosed.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: August 27, 2013
    Assignees: Case Western Reserve University, The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Alp Sehirlioglu, Ali Sayir, Fred Dynys
  • HIGH TEMPERATURE PIEZOELECTRIC CERAMICS
    Publication number: 20130020524
    Abstract: Piezoelectric ceramics that can be used in high temperature actuators. The piezoelectric ceramics have various desirable properties, for example the materials do not depole up to about 400° C. and have large piezoelectric coefficients>400 pm/V. In addition the thickness mode electromechanical coupling coefficient is large, increasing from 0.5 to 0.65 with temperature. The planar electromechanical coefficient is around 0.40 and does not show a significant dependence on temperature. These materials are highly polarizable with remnant polarization around 50 ?C/cm2 and are electrically hard with coercive field above 20 kV/cm. They exhibit single crystal like ferroelectric behavior with square hysteresis loops. Such properties make these materials a piezoelectric ceramic that can be used in stack actuators at high temperatures. Methods for preparing the piezoelectric ceramics are also disclosed.
    Type: Application
    Filed: July 24, 2012
    Publication date: January 24, 2013
    Applicants: NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, CASE WESTERN RESERVE UNIVERSITY
    Inventors: Alp SEHIRLIOGLU, Ali SAYIR, Fred DYNYS