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:
Jan. 09, 1996
Filed:
Aug. 25, 1994
Flora Yeung, Agoura Hills, CA (US);
Meryl R Jackson, Carriere, MS (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A method and system for removing organic deposits from the surface of sand particles. The organic deposits include molding compound and carbonaceous materials which are deposited on sand particles during their use in foundry operations. The organic deposits are exposed to a laser beam having a wavelength which is selectively absorbed by at least a portion of the organic deposits, while being essentially transmitted by the sand particles. The organic deposits are selectively heated by the laser beam resulting in vaporization and/or decomposition of the deposits without significant heating of the underlying sand particles.