Back to results
US 11,883,540 B2Granted
Stimulus activated cork-shell capsules
AssigneeMcMaster University
InventorsTodd Hoare, Jonathan Dorogin, David Koff, Andrew Singh
Life of this patent
Estimating the term…
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.
Claims23
A core-shell particle, comprising
- 1) An outer shell comprising at least one first polymer;
- and
- 2) at least one particulate phase embedded and/or dispersed within the outer shell, wherein the particulate phase comprises at least one inorganic oxide, metal salt, polymer, organometallic compound or contrast agent, and wherein the at least one particulate phase is releasable from or perdurable within the outer shell to create a pore in the outer shell upon exposure to an external stimulus, and wherein the at least one particulate phase has a different mechanical index from the outer shell.
Dependencies are inferred from the claim text.