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:
Jun. 05, 1984
Filed:
Sep. 08, 1982
Egisto Boschetti, Chatou, FR;
Pharmindustrie, Gennevilliers, FR;
Abstract
Tridimensional cross-linked random copolymers, insoluble in water, containing in copolymerized form: (a) 25% to 98% by weight of N-[tris(hydroxymethyl)methyl]acrylamide or N-[tris(hydroxymethyl)methyl]methacrylamide, or a mixture of these two compounds. (b) 2% to 50% by weight of one or more monomers containing two or several polymerizable ethylenic double bonds and free from anionic or cationic functional groups, and (c) 0.1% to 50% by weight of one or more monomers containing a polymerizable ethylenic double bond and one or more mono- or di-substituted amino, pyrimidinyl, guanidyl, purinyl, quaternary ammonium, SO.sub.3 H or SO.sub.3 M groups, M being an alkali metal. These copolymers are utilizable, in the form of aqueous gels, as ion exchangers.