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. 06, 2025
Filed:
Dec. 10, 2019
Goldway Technology Limited, Hong Kong, CN;
Wing Yan Lee, Hong Kong, CN;
Juan Cheng, Hong Kong, CN;
Chun Yan Dominique Lau, Hong Kong, CN;
Wing Chi Tang, Hong Kong, CN;
Ka Wing Cheng, Hong Kong, CN;
Ching Tom Kong, Hong Kong, CN;
Koon Chung Hui, Hong Kong, CN;
GOLDWAY TECHNOLOGY LIMITED, Hong Kong, CN;
Abstract
A process of assigning a colour grade to a diamond, including the steps of (i) determining the N3 and C-center content of a diamond (); (ii) comparing the N3 and C-center content of the diamond with a previously acquired data set from a plurality of diamonds each having a colour grading previously assigned thereto, and (iii) assigning a colour grade to the diamond upon a correlation of the N3 and C-center content of said diamond with a grade of said previously acquired data set; wherein said previously acquired data set comprises a correlation between N3 and C center content and optical absorbance in the visible light spectrum for each diamond of said plurality of diamonds.