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. 12, 1977
Filed:
Aug. 09, 1976
Syed N Hoda, Horseheads, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
The instant invention is directed to the production of opal glasses through the solid state vitrification of certain bentonite-type clays. The process involves five general steps: (1) the clay is ion exchanged at low temperatures in aqueous solutions; (2) the ion exchanged clay is thoroughly washed with water; (3) the ion exchanged clay is preferably heated at moderate temperatures to expedite removal of the water; (4) the dehydrated clay is shaped into a body of a desired configuration; and (5) the shaped body is fired to vitrification utilizing a defined sintering schedule. The resulting body is a white or off-white opal glass containing minor amounts of crystal phases. Uniformly colored glasses can be prepared employing such conventional glass coloring agents as chromium, cobalt, copper, nickel, vanadium, etc. The process possesses the practical advantages of inexpensive batch materials, the elimination of the need for glass melting facilities, and low energy consumption in forming glass articles.