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:
Aug. 21, 2007
Filed:
Aug. 11, 2005
John Francis Waymouth, Marblehead, MA (US);
Robert Thomas Nachtrieb, Lansdale, PA (US);
Farheen Khan, Coopersburg, PA (US);
Mark Alan Hartfield, Saint Joseph, MI (US);
Mark Stephen Taipale, Harleysville, PA (US);
Renzo Corrado Demeo, Huntington, NY (US);
Russell Lawrence Macadam, Coopersburg, PA (US);
John Francis Waymouth, Marblehead, MA (US);
Robert Thomas Nachtrieb, Lansdale, PA (US);
Farheen Khan, Coopersburg, PA (US);
Mark Alan Hartfield, Saint Joseph, MI (US);
Mark Stephen Taipale, Harleysville, PA (US);
Renzo Corrado DeMeo, Huntington, NY (US);
Russell Lawrence MacAdam, Coopersburg, PA (US);
Lutron Electronics Co., Inc., Coopersburg, PA (US);
Abstract
Apparatus and methods for measuring cathode fall in fluorescent lamps are disclosed. Together with measurements of cathode temperature, such measurements of cathode fall may inform a determination of cathode heater voltage as a function of discharge current (i.e., a cathode-heating-profile) that avoids both sputtering and excess-evaporation.