Patents by Inventor Gueorgui Milev Mihayiov

Gueorgui Milev Mihayiov 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).

  • 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