The opinion in support of the decision being entered today was not written for publication and is not
binding precedent of the Board.
Paper No. 42
UNITED STATES PATENT AND TRADEMARK OFFICE
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BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
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Ex parte ULF SCHRODER and LEIF G. SALFORD
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Appeal No. 2000-2076
Application No. 08/481,131
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HEARD: July 25, 2002
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Before WINTERS, SCHEINER, and GREEN, Administrative Patent Judges.
WINTERS, Administrative Patent Judge.
DECISION ON APPEAL
This appeal was taken from the examiner’s decision rejecting claims 11, 12, 14,
15, and 19 through 36, which are all of the claims remaining in the application.
REPRESENTATIVE CLAIM
Claim 11, which is illustrative of the subject matter on appeal, reads as follows:
11. A method of contrast enhanced ultrasonic diagnostic imaging comprising:
administering to a subject a contrast enhancing amount of spherical particles
comprising a matrix of a biocompatible, biodegradable, non-immunogenic polymer
enclosing a gaseous contrast agent which reflects sound waves, said polymer being
selected from the group consisting of carbohydrates, carbohydrate derivatives and non-
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