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:
Jul. 15, 1997
Filed:
Oct. 04, 1994
Robert Kaiser, Winchester, MA (US);
Entropic Systems, Inc., Winchester, MA (US);
Abstract
A cleaning system and method adapted for removal of small particles from solid substrates is disclosed. In one implementation, the system employs two on-line particle counters to measure particle concentrations in an incoming stream of filtered cleaning liquid, providing a baseline measurement, and in the outgoing or recirculation stream that has already made contact with the article to be cleaned. Comparison of the two measurements over time provides an accurate indication of the degree of particle removal, which is reported to the user and/or employed to control the cleaning cycle. In another implementation, the system employs a single detector that measures the magnitude of a signal (e.g., radioactivity) emitted by the particles; this signal continuously indicates the number of particles remaining on the substrate.