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. 20, 1977
Filed:
Jul. 16, 1976
Helmut Blum, Dusseldorf, DT;
Karl-Heinz Worms, Dusseldorf, DT;
Henkel Kommanditgesellschaft auf Aktien, Dusseldorf-Holthausen, DT;
Abstract
1,3-Di-amino-alkane-1,1-diphosphonic acids having the formula ##STR1## wherein R.sub.1 and R.sub.2 are members selected from the group consisting of hydrogen and alkyl having 1 to 3 carbon atoms, and R.sub.3 is a member selected from the group consisting of hydrogen and methyl; as well as their water-soluble salts. The 1,3-diamino-alkane-1,1-diphosphonic acids are excellent sequestering agents especially for alkaline earth metal ions. The compounds are useful in pharmaceutical preparations for treatment of disturbances of calcium or phosphate metabolism or cosmetic preparations such as toothpastes or mouth washes for the prevention of tartar and plaque depositions.