Ex parte Sandwick

The original patent requirement of 35 U.S.C. 251 demands more than written description support; reissue claims omitting the only fabrication method described in the patent (casting) fail that requirement even though skilled artisans would have understood other methods were conventional.

Written by

A language model, from how the MPEP uses this case rather than from the opinion.

Confidence

high — self-reported, not calibrated against a measured error rate

Human review

Not reviewed by a person

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