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:
Feb. 01, 2005
Filed:
Sep. 09, 2002
Peter Gefter, South San Francisco, CA (US);
Alexander Ignatenko, Hayward, CA (US);
Gopalan Vijaykumar, Fremont, CA (US);
Aleksey Klochkov, San Francisco, CA (US);
Peter Gefter, South San Francisco, CA (US);
Alexander Ignatenko, Hayward, CA (US);
Gopalan Vijaykumar, Fremont, CA (US);
Aleksey Klochkov, San Francisco, CA (US);
Ion Systems, Inc., Berkeley, CA (US);
Abstract
Apparatus and method for generating and controlling flows of positive and negative air ions includes interposing isolated sets of electrodes in a flowing air stream to separately produce positive and negative ions. The rates of separated production of positive and negative ions are sensed to control ionizing voltages applied to electrodes that produce the ions. Variations from a balance condition of substantially equal amounts of positive and negative ions flowing in the air stream are also sensed to alter bias voltage applied to a grid electrode through which the air stream and ions flow.