The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2005
Filed:
Jul. 17, 2003
Gueorgui Milev Mihayiov, Virginia Beach, VA (US);
Kirollos Salama Kirollos, Virginia Beach, VA (US);
Tesfa-michael Tekleab, Norfolk, VA (US);
Gueorgui Milev Mihayiov, Virginia Beach, VA (US);
Kirollos Salama Kirollos, Virginia Beach, VA (US);
Tesfa-Michael Tekleab, Norfolk, VA (US);
Other;
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.