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:
Jul. 02, 1985
Filed:
Feb. 22, 1984
Corning Glass Works, Corning, NY (US);
Abstract
The present invention is primarily concerned with the production of transparent glass-ceramic articles especially suitable for use as cooking utensils nucleated with up to 6% TiO.sub.2 and containing up to 0.25% Fe.sub.2 O.sub.3 and, perhaps, up to 0.1% MnO.sub.2, which exhibits a light brown tint that the human eye perceives essentially constant when the dominant wavelength is held between 577-581 nm, purity between 8-15%, and the transmission factor between about 65-80. The desired tint is obtained by including 0.0025-0.02% CoO+Cr.sub.2 O.sub.3, consisting of 0.001-0.01% CoO and 0.001-0.01% Cr.sub.2 O.sub.3, in the base composition of the glass-ceramic. An opaque glass-ceramic article exhibiting a light, warm creamy color perceived by the human eye as essentially constant when the dominant wavelength is held between 570-585 nm, the reflectance factor is in excess of 64, and the purity factor is no greater than 8% can be produced from like base compositions which are crystallized in situ at higher temperatures.