Foldable apparatus, ribbons, and methods of making
US12426184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Nov 9, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2457/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Foldable apparatus can comprise a foldable substrate comprising a substrate thickness and a central portion positioned between a first portion and a second portion. The central portion can comprise a central thickness less than the substrate thickness. A first maximum tensile stress of a first tensile stress region in the first portion and a second maximum tensile stress of the second tensile stress region in the second portion can be less than a third maximum tensile stress of a central tensile stress region in the central portion. Ribbons can comprise a ribbon thickness and a central portion positioned between a first portion and a second portion. The central portion can comprise a first central compressive stress region and a second central compressive stress region. In some embodiments, methods of processing a ribbon can comprise masking the first portion, masking the second portion, and chemically strengthening the central portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.