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:
Jan. 04, 1977
Filed:
Oct. 01, 1975
Applicant:
Inventor:
Nitis Sarkar, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; C08B / ; C08B / ;
U.S. Cl.
CPC ...
536 84 ; 106170 ; 1061 / ; 264 25 ; 264301 ; 264D / ; 424 35 ;
Abstract
Improved thermogelling methyl cellulose ether compositions for use in preparing pharmaceutical capsules by the pin dip coating process are prepared by blending the properties of water soluble methyl and C.sub.2 -C.sub.3 hydroxyalkyl cellulose ethers to achieve an essentially Newtonian dip coating solution and a rapid high thermal gel yield strength. These properties require a cellulose ether with a relatively narrow molecular weight distribution. Blends of low viscosity methyl cellulose and hydroxypropylmethyl cellulose provide particularly suitable dip solution properties, gel yield strength, and capsule dissolution rates.