Excerpt from my post @ 6:20...

The court notes that district courts and the Office use different standards of proof in determining invalidity, and thus, on the same evidence, could quite correctly come to different conclusions. Specifically, invalidity in a district court must be shown by "clear and convincing" evidence, whereas in the Office, it is sufficient to show nonpatentability by a "preponderance of evidence." Since the "clear and convincing" standard is harder to satisfy than the "preponderance" standard, deference will ordinarily be accorded to the factual findings of the court where the evidence before the Office and the court is the same. If sufficient reasons are present, claims held valid by the court may be rejected in reexamination.

On the other hand, a final Federal Court holding of invalidity or unenforceability (after all appeals), is binding on the Office

regards