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:
Nov. 11, 1997
Filed:
Sep. 07, 1995
John N Zabasajja, Baton Rouge, LA (US);
John W Gross, Sr, Baton Rouge, LA (US);
Robert E Aikman, Jr, Lake Jackson, TX (US);
Charles W Martin, Central, SC (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A bonded, non-asbestos chlor-alkali diaphragm comprising one or more water-wettable materials and one or more chemically-resistant materials, which is characterized by having a Macmullin number and average diaphragm thickness such that the product of these is between about 5 and about 30 millimeters when the average diaphragm thickness is measured in millimeters, and by a median pore size between about 0.1 microns and about 1 micron, wherein one or more of the chemically-resistant materials is or are coated with a durable, adherent coating of an ion-containing polymer which is bonded into the diaphragm on such materials.