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:
Mar. 12, 2002
Filed:
Nov. 06, 1998
David Nalewajek, West Seneca, NY (US);
Rajat Subhra Basu, Williamsville, NY (US);
David Paul Wilson, East Amherst, NY (US);
Michael Van Der Puy, Cheektowaga, NY (US);
Ellen Louise Swan, Ransonville, NY (US);
Peter Brian Logsdon, North Tonawanda, NY (US);
Gary J. Zyhowski, Carol Stream, IL (US);
Hepburn Ingham, Buffalo, NY (US);
Daniel Franklin Harnish, Orchard Park, NY (US);
Joel Edward Rodgers, Convent Station, NJ (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A non-aqueous cleaning process uses an organic solvent for removing soil or surface contamination from contaminated articles such as printed circuit boards which are cleaned by immersion into a sump compartment of a cleaning tank containing the organic cleaning solvent. The organic solvent is preferably a hydrocarbon solvent. The cleaned articles, now coated with the organic cleaning solvent, are then disposed in a rinsing sump containing a fluorocarbon based rinsing solvent having an affinity for the organic cleaning solvent. The organic solvent is thus removed from the articles which are then dried without waste water as in a conventional solvent vapor degreasing solvent process.