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:
Jun. 06, 2000
Filed:
Dec. 18, 1997
Applicant:
Inventor:
Thomas Owen Murdock, Vadnais Heights, MN (US);
Assignee:
Alza Corporation, Mountain View, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61F / ;
U.S. Cl.
CPC ...
424 7812 ; 424 781 ; 424449 ; 424 7808 ; 424 7811 ;
Abstract
A method is provided for preparing drug formulations suitable for electrotransport drug delivery. The drug to be delivered, present in salt form, is contacted with an ion exchange material prior to incorporation into the reservoir (26) of an electrotransport delivery system (10). In this way, the drug salt is partially or completely neutralized. This technique is useful for adjusting the pH of the drug formulation without incorporating extraneous materials, e.g., competing ions or the like, into the reservoir (26).