Methods and apparatuses for hollow and multi-material stereolithography
US12390989B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Feb 10, 2023 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | May 30, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2867/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Described herein are stereolithographic methods for preparing 3D objects comprising hollow regions and/or multiple materials. In certain embodiments, the methods comprise applying a blocking composition to fill hollow regions in the 3D printed object. In certain embodiments, an absorbent is applied to dispense material into the 3D printed objects and to remove unwanted resin from the hollow regions. Additionally, in certain embodiments, the modular stereolithographic apparatuses described herein contain an invertible, double vat, which enables users easy access to multiple materials throughout the 3D printing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.