Stimulus activated cork-shell capsules
US11883540B2 · kind B2 · utility
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23Claims
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Key dates
| Filing date | May 14, 2021 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | May 15, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1641
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present application relates to a vehicle whose shell material is modified with at least one additional secondary phase that acts as a cork. In the presence of an energy source (preferably ultrasound), the corks embedded in the shell are either removed from the shell to create permanent pores or perturbed within the shell to create transient pores that can control transport in or out of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.