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. 11, 2017
Filed:
Feb. 28, 2014
Dow Global Technologies Llc, Midland, MI (US);
Oliver Petermann, Hamburg, DE;
Robert B. Appell, Midland, MI (US);
Meinolf Brackhagen, Walsrode, DE;
Abstract
An esterified cellulose ether which comprises (i) aliphatic monovalent acyl groups or (ii) 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, or (iii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, and which has a) a viscosity of from 1.2 to 1.8 mPaos, measured as a 2.0 wt % solution of the esterified cellulose ether in 0.43 wt % aqueous NaOH at 20° C., or b) a viscosity of up to 5 mPa·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C., or c) a combination of the viscosities of a) and b), is useful for preparing solid dispersions comprising drugs.