Corning has been granted a patent for complexly curved laminates, including automotive window glazings, made from curved and flat substrates. The method involves cold forming glass products with different stress values on surfaces. The laminate ranges from 1.8mm to 5.85mm in thickness, with specific curvature and strengthening criteria. GlobalData’s report on Corning gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Corning, Ceramic membrane fuel cells was a key innovation area identified from patents. Corning's grant share as of April 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.
Laminates for automotive window glazings with complexly-curved glass substrates
A recently granted patent (Publication Number: US11964545B2) discloses a laminate structure comprising two complexly-curved glass substrates with a polymer interlayer affixed between them. The laminate has a thickness ranging from 1.8 mm to 5.85 mm, with the second substrate made of aluminosilicate glass. The first glass substrate is hot-formed and curved along specific axes, while the second glass substrate is cold-formed against the first one via the polymer interlayer. The patent claims include details on the composition of the glass substrates, the thickness of the polymer interlayer, and the specific forces exerted by different portions of the second glass substrate on the interlayer.
Furthermore, the patent claims cover aspects such as the presence of optical distortion, surface roughness of the glass substrates, and the application areas of the laminate, which include windshields, sunroofs, and sidelights. The patent also specifies conditions under which the laminate does not exhibit visible optical distortion and provides guidelines for evaluating optical distortion according to ASTM standards. The claims highlight the importance of the curvature radii, thickness ratios between the glass substrates, and the strengthening methods employed for the second glass substrate. Overall, the patent aims to protect a unique laminate structure that offers specific advantages in terms of optical quality, structural integrity, and application versatility in the field of glass technology.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
