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:
Oct. 20, 1992
Filed:
Jun. 13, 1989
Pierre Blanquet, Rambouillet, FR;
Francois Ricalens, Paris, FR;
Compagnie Francaise de Mokta, Velizy-Villacoublay, FR;
Abstract
New diphosphonic derivatives are capable of extracting the uranium in phosphoric acid with a P205 content ranging from 10 to 50 per unit. The new diphosphonic derivatives have the following formula: ##STR1## wherein R is selected from the group consisting of hydrogen and alkyl radicals having 1 to 15 carbon atoms and having at most 2 branchings in the alkyl radical, and A is a mono- or di- substituted methylene radical wherein the substituents are selected from the group consisting of an alkyl group having at most two branchings, hydroxyl, an amino group, and hydrogen, wherein the total number of carbon atoms in the R and A groups is from 15 to 50 carbon atoms, with the proviso that when A is substituted by hydroxy or amino. A has 15 to 25 carbon atoms, and wherein A is linked to a water insoluble crosslinked ion exchange resin skeleton.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile