	US 12,441,645 B1
	Glass parts and gob-pressing methods for making such
Richard Dominic Bomba, Rochester, NY (US); Cyril Rémy André Dedieu, Hericy (FR); Arnaud Dominique Dejean, Vaux le Penil (FR); Allan Mark Fredholm, Vulaines sur Seine (FR); Anne-Claire Jeanson, Avon (FR); David John McEnroe, Wellsville, NY (US); Mathieu Mondésir, Egreville (FR); Galan Gregory Moore, Henrietta, NY (US); Aniello Mario Palumbo, Painted Post, NY (US); David Sampaio, Nemours (FR); Thomas Matthew Sonner, Corning, NY (US); and Joseph William Soper, Arkport, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jan. 17, 2025, as Appl. No. 19/028,587.
Application 19/028,587 is a continuation in part of application No. 18/677,404, filed on May 29, 2024, granted, now 12,234,175.
Claims priority of provisional application 63/722,385, filed on Nov. 19, 2024.
Claims priority of provisional application 63/634,535, filed on Apr. 16, 2024.
This patent is subject to a terminal disclaimer.
Int. Cl. C03B 11/08 (2006.01)

CPC C03B 11/08 (2013.01) [C03B 2215/40 (2013.01)]

20 Claims

1. A method of making a glass part, comprising:

gob-pressing glass to form the glass part, wherein the gob-pressing comprises pressing a gob of molten glass into a mold such that the gob spreads outward in the mold to form the molten glass to a shape of the glass part,

wherein the shape comprises first and second major surfaces facing away from one another and a thickness orthogonal to the first and second major surfaces and extending therebetween, wherein the shape comprises a geometric centroid, and wherein the shape has length and width aligned with the first and second major surfaces and orthogonal to one another;

wherein the length of the shape is greater than the width;

wherein the first and second major surfaces each have an area of at least 4 cm²and the thickness for at least a portion of the shape between the major surfaces is less than 2 mm;

wherein a cross-sectional portion of the shape between the first and second major surfaces extending along a 2 cm linear path varies in thickness less than 100 μm;

wherein the shape comprises curvature of at least a portion of surfaces thereof that comprises a radius of curvature of less than 1 m;

wherein the glass of the glass part is an aluminosilicate, comprising in molar percentage on an oxide basis at least 40 mol % silica and no more than 80 mol % silica, and at least 2 mol % alumina and no more than 30 mol % alumina;

wherein the glass has a dielectric constant D_kat 10 GHz less than or equal to 6.8;

wherein the glass is configured for chemical strengthening, comprising at least 5 mol % alkali metal oxides and no more than 25 mol % of the alkali metal oxides;

chemically strengthening the glass of the glass part, wherein the glass has a surface compressive stress and a central tension; and

heat treating the glass of the glass part to grow crystals therein, wherein the crystals comprise at least 50 vol % of the glass part and no more than 99 vol %.