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:
Aug. 28, 1984
Filed:
Dec. 20, 1982
Frank Solomon, Great Neck, NY (US);
Diamond Shamrock Corporation, Dallas, TX (US);
Abstract
This disclosure is directed to the preparation of a self-sustaining hydrophobic backing layer which also possesses excellent electrical conductivity so that it can serve as an intermediate layer between the current distributor and the active layer of a complete oxygen cathode. Said backing layer is formed by a simple process in which an intimate liquid dispersion containing finely divided carbon black and not more than equal parts by weight of PTFE particles ranging in size from about 0.05 to about 0.5 microns is dewatered and shaped into a thin layer which is thereafter lightly pressed and consolidated at elevated temperatures. Preferably, the carbon black is an acetylene black of a particle size range between 50 and 3000 Angstroms and the weight proportion of same is greater than the PTFE.