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:
Oct. 15, 2013
Filed:
Mar. 17, 2010
Randolph K. Armstrong, Houston, TX (US);
Scott A. Armstrong, Danbury, TX (US);
D. Michael Inman, Gainesville, FL (US);
Timothy L. Scott, Sugar Land, TX (US);
Randolph K. Armstrong, Houston, TX (US);
Scott A. Armstrong, Danbury, TX (US);
D. Michael Inman, Gainesville, FL (US);
Timothy L. Scott, Sugar Land, TX (US);
Cyberonics, Inc., Houston, TX (US);
Abstract
A method and an apparatus for determining a time period remaining in a useful life of an energy storage device in an implantable medical device. The method may include measuring a voltage of the energy storage device to produce a measured voltage, and comparing the measured voltage to a transition voltage. While the measured voltage is greater than or equal to the transition voltage, the time period remaining in the energy storage device's useful life is approximated based upon a function of charge depleted. While the measured voltage is less than the transition voltage, the time period remaining in the energy storage device's useful life is approximated based upon a higher order polynomial function of the measured voltage. The transition voltage corresponds to a predetermined point on a energy storage device voltage depletion curve representing the voltage across the energy storage device over time.