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:
Jun. 25, 1996
Filed:
Dec. 30, 1994
Bruce G Aitken, Erwin, NY (US);
George H Beall, Big Flats, NY (US);
James E Dickinson, Jr, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
The subject invention is directed at wherein either a portion of the ZnO or alkali metals, or both, found in prior art glasses, is replaced by Cu.sub.2 O, i.e., cuprous or monovalent copper. In addition to the Cu.sub.2 O substitution, the inventive glass contains a required metal oxide constituent which is necessary to enhance durability. More specifically, the present invention discloses a glass consisting essentially of, expressed in terms of mole percent on the oxide basis, of about 42-54% P.sub.2 O.sub.5, 10-30% Cu.sub.2 O, 10-30% R.sub. O and 3-12% of a component selected from the group consisting of 0-7% MoO.sub.3, 0-10 Fe.sub.2 O.sub.3, 0-10% Al.sub.2 O.sub.3 and 0-7%WO.sub.3. In addition, the composition includes up to a total of 45% of optional ingredients in the indicated proportions selected from the group consisting of 0-15% MgO, 0-20% CaO, 0-20% SrO, 0-20% BaO, 0-25% MgO+CaO+SrO+BaO, 0-35% ZnO, 0-10% MnO, 0-2% CeO.sub.2, 0-10% B.sub.2 O.sub.3, 0-2% Ln.sub.2 O.sub.3 , 0-8% F, the latter as analyzed in weight percent. The R.sub.2 O constituent is selected from the group consisting of 0-15% Li.sub.2 O, 0-20% Na.sub.2 O, and 0-10% K.sub.2 O. Furthermore, the Al.sub.2 O.sub.3 +Fe.sub.2 O.sub.3 does not exceed 10% and the MoO.sub.3 +WO.sub.3 does not exceed 7%. One final requirement of the glass is that the predominate proportion of the copper is present in the Cu.sup.+ or monovalent oxidation state.