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US 8,261,577 B2Granted
Method for making hollow microspheres
Assignee3M Innovative Properties Company
InventorGang Qi
Life of this patent
Estimating the term…
Abstract
There is provided a method for making hollow microspheres including heating a feed under conditions sufficient to convert at least a portion of the feed into hollow microspheres, where the heating is conducted under a vacuum. There is also provided hollow microspheres made using this method.
Claims9
A method of forming hollow microspheres comprising heating a feed under conditions sufficient to convert at least a portion of the feed into hollow microspheres, wherein the heating is conducted under a vacuum;
- further comprising providing the feed using a dispensing system, the dispensing system comprising an elongated housing having a hollow inner tube vertically centered therein;
- fluidizing the feed in the elongated housing;
- and introducing the feed into the hollow inner tube using a carrier gas.
Dependencies are inferred from the claim text.