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:
Dec. 09, 2025
Filed:
Sep. 16, 2019
Applicant:
Versitech Limited, Hong Kong, HK;
Inventors:
Xiaoyan Li, Hong Kong, HK;
Haibo Li, Hong Kong, HK;
Assignee:
VERSITECH LIMITED, Hong Kong, HK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 65/02 (2006.01); B01D 69/02 (2006.01); B01D 71/08 (2006.01); B01J 20/28 (2006.01); B01J 20/32 (2006.01); B01J 20/34 (2006.01); B32B 25/04 (2006.01); B32B 25/06 (2006.01); B32B 25/10 (2006.01); B32B 25/20 (2006.01); B32B 37/10 (2006.01); B32B 38/06 (2006.01); C02F 1/28 (2023.01); C08J 9/42 (2006.01); D06N 7/00 (2006.01); C02F 1/44 (2023.01); C02F 101/30 (2006.01);
U.S. Cl.
CPC ...
D06N 7/0002 (2013.01); B01D 65/02 (2013.01); B01D 69/02 (2013.01); B01D 71/08 (2013.01); B01J 20/28045 (2013.01); B01J 20/28085 (2013.01); B01J 20/3274 (2013.01); B01J 20/3278 (2013.01); B01J 20/3282 (2013.01); B01J 20/3425 (2013.01); B01J 20/3475 (2013.01); B32B 25/04 (2013.01); B32B 25/06 (2013.01); B32B 25/10 (2013.01); B32B 25/20 (2013.01); B32B 37/10 (2013.01); B32B 38/06 (2013.01); C08J 9/42 (2013.01); B01D 2321/04 (2013.01); B01D 2323/30 (2013.01); B01D 2325/026 (2013.01); C02F 1/288 (2013.01); C02F 1/444 (2013.01); C02F 2101/308 (2013.01); C02F 2303/16 (2013.01); C08J 2405/08 (2013.01); D06N 2203/066 (2013.01); D06N 2209/043 (2013.01); D06N 2209/067 (2013.01); D06N 2209/142 (2013.01); D06N 2209/1692 (2013.01); D06N 2211/063 (2013.01);
Abstract
Devices and methods related to a chitosan-enhanced melamine sponge are provided. A method comprises grafting chitosan on the melamine sponge matrix via the chemical with two or more carboxyl groups; and crosslinking the chitosan with crosslinker under a heating procedure to make a more robust melamine sponge with a larger surface and smaller pores. The chitosan-enhanced melamine sponge is used to separate chemicals from water as a gravity flow-driven filter, and it can be compressed and backwashed for regeneration.