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:
Jun. 20, 2006
Filed:
Jan. 22, 2003
Michael Clinton Johnson, Grand Island, NY (US);
Carl Joseph Heim, Amherst, NY (US);
John Fredric Billingham, Getzville, NY (US);
Mark Leonard Malczewski, North Tonawanda, NY (US);
Michael Clinton Johnson, Grand Island, NY (US);
Carl Joseph Heim, Amherst, NY (US);
John Fredric Billingham, Getzville, NY (US);
Mark Leonard Malczewski, North Tonawanda, NY (US);
Praxair Technology, Inc., Danbury, CT (US);
Abstract
This invention relates to methods and systems for detecting contaminants that can precipitate and deposit on a workpiece during a carbon dioxide application, especially contaminants that are already present and dissolved in the fresh carbon dioxide fed to the application. One aspect of this invention includes a method of detecting contaminants dissolved in a carbon dioxide stream, including the steps of sampling at least a portion of the carbon dioxide stream to form a carbon dioxide sample; modifying at least one physical condition of the carbon dioxide sample to form an aerosol that includes gaseous carbon dioxide and at least one suspended contaminant; and detecting the number of particles of suspended contaminant in at least a portion of the carbon dioxide sample with at least one particle counter. A system for continuously detecting contaminants dissolved in a carbon dioxide stream is also described.