Patents by Inventor Tesfa-Michael Tekleab

Tesfa-Michael Tekleab 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).

  • Instantaneous and time-lapse fluid-flow contaminant indicator
    Patent number: 10775312
    Abstract: A fluid-flow contaminant indicator includes a container having a fluid-flow path having an upstream region and a downstream region. A colorimetric indicator, disposed in the fluid-flow path, has a surface adapted to change color when exposed to a contaminant of interest. The colorimetric indicator has at least one hole passing there through such that the fluid-flow path extends through the hole(s) in the colorimetric indicator. A fluid-impervious mask is adhered to all of the colorimetric indicator's surface except for a region of the surface that is adjacent to the hole(s) in the colorimetric indicator wherein this region is exposed to the upstream region of the fluid-flow path.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: September 15, 2020
    Inventor: Tesfa-Michael Tekleab
  • INSTANTANEOUS AND TIME-LAPSE FLUID-FLOW CONTAMINANT INDICATOR
    Publication number: 20180364176
    Abstract: A fluid-flow contaminant indicator includes a container having a fluid-flow path having an upstream region and a downstream region. A colorimetric indicator, disposed in the fluid-flow path, has a surface adapted to change color when exposed to a contaminant of interest. The colorimetric indicator has at least one hole passing there through such that the fluid-flow path extends through the hole(s) in the colorimetric indicator. A fluid-impervious mask is adhered to all of the colorimetric indicator's surface except for a region of the surface that is adjacent to the hole(s) in the colorimetric indicator wherein this region is exposed to the upstream region of the fluid-flow path.
    Type: Application
    Filed: December 8, 2017
    Publication date: December 20, 2018
    Inventor: Tesfa-Michael Tekleab
  • End of service life indicator for fluid filter
    Patent number: 6979361
    Abstract: An end of service life indicator (ESLI) device for a fluid filter is included on the filter and visually indicates when the life of the filter has expired. The ESLI indicates the depletion of the filter by changing the color density on a surface of the device to a color density having a well distinguishable contrasting pattern that is easily recognizable even by individuals who are color-blind. The contrasting pattern may express text indicative of the state of the filter.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: December 27, 2005
    Inventors: Gueorgui Milev Mihayiov, Kirollos Salama Kirollos, Tesfa-Michael Tekleab
  • End of service life indicator for fluid filter
    Publication number: 20040083896
    Abstract: An end of service life indicator (ESLI) device for a fluid filter is included on the filter and visually indicates when the life of the filter has expired. The ESLI indicates the depletion of the filter by changing the color density on a surface of the device to a color density having a well distinguishable contrasting pattern that is easily recognizable even by individuals who are color-blind. The contrasting pattern may express text indicative of the state of the filter.
    Type: Application
    Filed: July 17, 2003
    Publication date: May 6, 2004
    Inventors: Gueorgui Milev Mihaylov, Kirollos Salama Kirollos, Tesfa-Michael Tekleab