Fed. Circ. Says Machining Patent Violated Reissue Rules

By Matthew Bultman (June 17, 2019, 7:21 PM EDT) -- The Federal Circuit on Monday invalidated several claims that Flow Valve LLC added through the reissue process to a patent on a supporting assembly used during machining, finding the claims failed to meet the requirements of the "Original Patent" rule.

The appeals court, in a precedential opinion, affirmed an Oklahoma federal judge's February 2018 ruling in favor of rival oilfield products company Forum US Inc., which had brought a lawsuit seeking a judgment that the reissue claims are invalid.

"We must determine whether the new claims in the reissue patent comply with the original patent requirement. We hold that they do...

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