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. 03, 1990
Filed:
Jan. 06, 1986
John E Leonard, Irvine, CA (US);
Broadley-James Corporation, Santa Ana, CA (US);
Abstract
A reference electrode, optionally in combination with a measuring electrode to form a combination electrode, is disclosed in which the salt bridge comprises anionic and cationic ion exchange polymer. This polymer may be a diaphragm forming the liquid junction structure of the reference electrode. Polymer is preferably a mixture of anionic and cationic ion exchange polymer which may be either water insoluble or water soluble and is preferably converted to a form which binds equitransferent ions. When the polymer is substantially insoluble, a water-soluble thickener polymer may be incorporated in the polymer composition. Methods of measuring pH using the electrodes of the invention are also disclosed, particularly in high purity deionized water.