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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.:

US 10251850 B1

PDFFull Text
Date of Patent:
Apr. 09, 2019

Filed:

Jan. 11, 2018

Process for preparation of cysteamine bitartrate

Applicant:

Lupin Limited, Mumbai, Maharashtra, IN;

Inventors:

Pankaj Ramchandra Chaudhari, Maharashtra, IN;

Sukhdeo Sampat Gunjal, Maharashtra, IN;

Raju Muktaji Walunj, Maharashtra, IN;

Anurag Trivedi, Maharashtra, IN;

Rajinder Singh Siyan, Maharashtra, IN;

Nandu Baban Bhise, Maharashtra, IN;

Girij Pal Singh, Maharashtra, IN;

Assignee:

LUPIN LIMITED, Mumbai, Maharashtra, IN;

Attorney:

Merchant & Gould P.C.

Primary Examiner:

Sudhakar Katakam

Assistant Examiner:

Jennifer C Sawyer

Int. Cl.
CPC ...
C07C 59/245 (2006.01); A61K 31/145 (2006.01); A61K 31/095 (2006.01); C07C 323/25 (2006.01); C07C 319/12 (2006.01); G01N 30/88 (2006.01); G01N 30/02 (2006.01); G01N 23/20 (2018.01);
U.S. Cl.
CPC ...
A61K 31/145 (2013.01); A61K 31/095 (2013.01); C07C 59/245 (2013.01); C07C 319/12 (2013.01); C07C 323/25 (2013.01); G01N 30/88 (2013.01); C07B 2200/13 (2013.01); G01N 23/20075 (2013.01); G01N 30/02 (2013.01); G01N 2030/027 (2013.01); G01N 2223/056 (2013.01);
Abstract

The present invention provides process for preparation of cysteamine bitartrate comprising reacting cysteamine or its salt with tartaric acid. The present invention further provides crystalline form L1 of cysteamine bitartrate having characteristic diffraction peaks at 10.36, 14.54, 17.23, 18.03, 19.24, 20.76, 21.20, 22.02, 23.37, 23.64, 27.71, 28.28, 29.26, 31.33, 32.84, 33.83, 35.51, 36.74±0.2 degree two theta in an X-ray diffraction pattern and process for preparation thereof. The present invention provides crystalline form L2 of cysteamine bitartrate having characteristic diffraction peaks at 7.4, 10.3, 11.0, 11.4, 14.4, 14.9, 18.6, 19.4, 20.1, 20.8, 21.9, 22.3, 22.5, 23.5±0.2 degree two theta in an X-ray diffraction pattern and process for preparation thereof.

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