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:
Aug. 24, 2010
Filed:
Aug. 03, 2006
Applicants:
Pyeong-uk Park, Ulsan, KR;
Seong-neon Kim, Ulsan, KR;
Chong-gu Lee, Ulsan, KR;
Ju-sung Lee, Ulsan, KR;
Inventors:
Pyeong-Uk Park, Ulsan, KR;
Seong-Neon Kim, Ulsan, KR;
Chong-Gu Lee, Ulsan, KR;
Ju-Sung Lee, Ulsan, KR;
Assignee:
ID Biochem, Inc., Ulsan, KR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 69/80 (2006.01); C07C 41/01 (2006.01); C07C 43/11 (2006.01); C07C 67/08 (2006.01); C08G 65/34 (2006.01); C08G 65/48 (2006.01); C08G 65/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a preparing method of methoxypolyethyleneglycol (mPEG) with high purity and derivatives thereof. More precisely, the method of the present invention to prepare high purity mPEG with at least 99% of purity, up to 1.05 of molecular weight distribution and 350˜100,000 of molecular weight includes the process of reacting commercial mPEG having low purity to give highly purified intermediates, mPEG-acetic acid of formula 1 and mPEG-phthalate of formula 2.