Method for the preparation of stable suspensions of hollow gas-filled microspheres suitable for ultrasonic echography
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United States of America Patent
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May 10, 1994
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N/A
app pub date -
May 6, 1992
filing date -
Oct 5, 1990
priority date (Note) -
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Abstract
A viscous solution of a filmogenic protein is whipped into a foam and the foam is subjected to shear to reduce the size of the foam bubbles to a range (about 0.5-10 .mu.m) suitable for echography. The proteins include animal and vegetal proteins or partial hydrolyzates thereof with foaming properties. The suspensions of microspheres can be stabilized by heat or by cross-linkers.
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