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:
Feb. 28, 2023
Filed:
Aug. 02, 2019
Applicant:
Clean and Science Company, Ltd., Rolling Meadows, IL (US);
Inventor:
Kyung-Ju Choi, Louisville, KY (US);
Assignee:
Clean and Science Company, Ltd., Rolling Meadows, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 46/00 (2022.01); H01L 41/193 (2006.01);
U.S. Cl.
CPC ...
B01D 46/0032 (2013.01); H01L 41/193 (2013.01); B01D 2239/0435 (2013.01);
Abstract
A system and method for making electret media is presently provided. The method involves placing a piezoelectric material adjacent a media and applying a mechanical stress to the piezoelectric material and thereby transferring an electric charge from the piezoelectric material to the media and making the electret media. The system is configured to place the piezoelectric material adjacent the media and to apply mechanical stress to the piezoelectric material.