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. 15, 2020
Filed:
Oct. 07, 2016
Weteq S.a., Luxembourg, LU;
Abraham Domb, Jerusalem, IL;
Shady Farah, Kfar-Yassif, IL;
YISSUM RESEARCH DEVELOPMENT COMPANY, Jerusalem, IL;
Abstract
Polymers containing nitrogen-halogen covalent bonds, i.e., N-halamine polymers, are provided for use in water treatment by reducing or removing microbes and toxic chemicals. Polymers containing one or more amide groups, guanidino groups, or groups derived from urethane or urea, are directly halogenated. The hydrolysis of N-halamine bonds is closely monitored by the presence of different electron-donating or electron-withdrawing groups adjacent to the nitrogen(s) of the N-halamine groups, and the resultant polymer can be facilely reloaded with halogen. Released halogen is in the form of an oxidative halogen or a hypohalous acid, in an effective amount and in an extended period of time, to significantly reduce the amount of a wide range of microbes includingand bacteriophage MS2 in contaminated water. Sponges, beads, resins, gel, and membranes made from these polymers are used in water treatment.