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:
Sep. 01, 2020
Filed:
Jan. 27, 2015
Dow Global Technologies Llc, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Esterified cellulose ethers which have i) as ester groups aliphatic monovalent acyl groups or a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, ii) a weight average molecular weight Mof from 80,000 Dalton to 220,000 Dalton, iii) a Polydispersity M/Mof from 1.3 to 4.0, and iv) an M/Mof not more than 18.5, when the weight average molecular weight M, the number average molecular weight Mn and the z-average molecular weight Mare measured by SEC-MALLS using as mobile phase a mixture produced from 40 parts by volume of acetonitrile and 60 parts by volume of aqueous buffer containing 50 mM NaH—POand 0.1 M NaNO. are useful as enteric polymers for pharmaceutical dosage forms.