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:
Sep. 22, 2015
Filed:
Dec. 12, 2012
Spi Lasers Uk Limited, Hedge End, GB;
Paul Martin Harrison, East Grinstead, GB;
SPI Lasers UK Ltd., Southampton, GB;
Abstract
A method for laser marking a metal surface () with a desired color, which method comprises forming at least one first pattern () on the metal surface () with a first laser beam () having a first pulse fluence (), forming at least one second pattern () on the metal surface with a second laser beam () having a second pulse fluence (), characterized by causing the second pattern () to overlay the first pattern (), arranging the first pulse fluence () to be at least five times greater than the second pulse fluence (), the color being given by the first and second pulse fluences () and spot spacings () in the first and second patterns (), and selecting the first and second pulse fluences () and the spot spacings () to form the desired color.