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:
Apr. 21, 2020
Filed:
Sep. 05, 2017
Applicant:
Jacobus Pharmaceutical Company, Inc., Princeton, NJ (US);
Inventors:
Guy Alan Schiehser, Washington Crossing, PA (US);
Rajendra Shah, Edison, NJ (US);
Wenyi Zhao, Monroe Township, NJ (US);
Assignee:
JACOBUS PHARMACEUTICAL COMPANY, INC., Princeton, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 213/73 (2006.01); C07D 401/04 (2006.01); G01N 30/74 (2006.01); G01N 30/88 (2006.01); G01N 30/02 (2006.01);
U.S. Cl.
CPC ...
C07D 213/73 (2013.01); C07D 401/04 (2013.01); G01N 30/74 (2013.01); G01N 2030/027 (2013.01); G01N 2030/884 (2013.01); G01N 2030/8872 (2013.01);
Abstract
The present invention relates to methods of determining the purity of a sample of 3,4-diaminopyridine comprising determining the presence, absence, or amount of a dimer of 3,4-diaminopyridine or a dimer of 3,4-diaminopyridine in the form of a salt, solvate or complex or a combination thereof. The invention also relates to methods of detecting and quantitating degradation in a sample of 3,4-diaminopyridine. Dimers of 3,4-diaminopyridine and methods of making and isolating the same are also provided.