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:
Jul. 01, 2025
Filed:
Jan. 31, 2022
Applicant:
Pukyong National University Industry-university Cooperation Foundation, Busan, KR;
Inventors:
Hyun Kyoung Yang, Busan, KR;
Jin Young Park, Busan, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 11/50 (2014.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/324 (2014.01); C09D 11/36 (2014.01); G01N 21/27 (2006.01);
U.S. Cl.
CPC ...
C09D 11/50 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/324 (2013.01); C09D 11/36 (2013.01); G01N 21/272 (2013.01);
Abstract
Disclosed are a method for producing carbon quantum dots having color change based on a cumulative amount of exposure thereof to UV light, and to a color change sensor including the same that indicates a cumulative UV amount. The method for producing the carbon quantum dots include performing solvothermal reaction on blue inkjet printer dye, urea and an organic solvent in a high pressure reactor.