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:
Feb. 04, 2025
Filed:
Sep. 17, 2020
Rk Pharma Solutions Llc, Piscataway, NJ (US);
Ravishanker Kovi, Monroe Township, NJ (US);
Jayaraman Kannappan, Vadodara, IN;
Hemant Mande, Gujarat, IN;
Dusanapudi Naga Venkata Raghavulu, Vadodara, IN;
RK Pharma Solutions LLC, Piscataway, NJ (US);
Abstract
The present application provides method for producing methylene blue that includes the steps of providing a reaction mixture having one or more methylene blue intermediates; precipitating metal from the reaction mixture; and producing therefrom crude methylene blue. The crude may further be purified, resulting in methylene compounds having low impurities, preferably having a purity greater than about 97%, having Azure B impurity no greater than 2.5%, and/or a total metal content no greater than 77 ppm. Formulations containing such compounds are also provided.