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:
May. 17, 1994
Filed:
Aug. 25, 1992
Deepak K Pai, Burnsville, MN (US);
Gene A Maday, Spring Lake Park, MN (US);
Ceridian Corporation, Bloomington, MN (US);
Abstract
An apparatus and method for a cleaning process control is disclosed. The apparatus includes two parallel plates of glass that have a plurality of shims positioned therebetween and a means for clamping these plates of glass firmly against the shims. A contaminant is positioned between the plates of glass and the apparatus is cleaned using a selected cleaning process. The apparatus can then be inspected to determine the effectiveness of a particular cleaning process by peering through the transparent glass plates to inspect for any remaining contaminant. The apparatus can then be cleaned more extensively and used again to check a different cleaning process.