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:
May. 21, 2024
Filed:
Nov. 10, 2020
Applicant:
Southwest Research Institute, San Antonio, TX (US);
Inventors:
Shawn T. Blumberg, San Antonio, TX (US);
Paul W. Miguel, San Antonio, TX (US);
Assignee:
SOUTHWEST RESEARCH INSTITUTE, San Antonio, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D 9/00 (2006.01); C07C 309/04 (2006.01); C07D 213/81 (2006.01);
U.S. Cl.
CPC ...
B01D 9/0054 (2013.01); C07C 309/04 (2013.01); C07D 213/81 (2013.01);
Abstract
The present invention is directed at the synthesis and characterization of recrystallized HI-6 dimethylsulfate (DMS). The method can comprise dissolving HI-6 DMS in an alkyl-based glycol and adding an antisolvent to recrystallize HI-6 DMS or dissolving HI-6 DMS in methanol and adding dimethoxy ethane or dimethyl formamide as the antisolvent to recrystallize HI-6 DMS. The recrystallized HI-6 DMS indicates a resistance to moisture absorption and/or a DSC melting point onset (MP Onset) at least at or above 160.0° C.