A Blog About Intellectual Property Litigation and the District of Delaware


Entries for tag: Pennypack

Disclosure of Expert Theory in Claim Construction Brief Defeats Later Motion to Strike

Andrew E. Russell, Sept. 28, 2020
MTS Pennypack

Judge Burke held last week that providing a substantive response to an indefiniteness theory in a claim construction brief was sufficient to preserve that argument for a later rebuttal expert report.

Typically you'd see that kind of disclosure in a discovery response on reasons for validity, or maybe in an expert declaration opposing a claim construction position (as opposed to being set forth as argument).

But the holding here makes sense under FRCP 26(e), which requires supplementing discovery responses only if the "information has not otherwise been made known . . . in writing."

It looks like the Court meant it when it held, earlier this month, that "any substantive response" to a theory prior to rebuttal expert reports …

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Court: Document Production Two Months Before Trial Sufficient to Avoid Prejudice

Andrew E. Russell, Sept. 14, 2020
Motion to Strike Pennypack

In the holding below, Judge Burke found that, under Pennypack, producing documents just over two months before trial was sufficient to provide time for "Defendants to be able to appropriately respond to Plaintiffs' expert's related position."

This is a shorter timeline than typically comes up. For example, Judge Burke has previously struck late-produced material where there were six months remaining before trial, although in that case the other Pennypack factors also played a role.

The facts here were not terrible for defendants. The documents had been produced by individual defendants in a set of related cases. According to the plaintiff, the expert reports at issue used the documents from various defendants to respond to arguments from those defendants, although …

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No expert? No problem. Maybe.

Andrew E. Russell, Sept. 7, 2020
Litigation Pennypack

Empty Chair
Giorgio Trovato, Unsplash

Sometimes people think that they have to offer expert testimony to rebut the other side's expert on every single issue. That's not true, at least when the other side has the burden of proof.

I've represented a defendant in a jury trial representing where we offered no damages expert at all, and it worked out well (under the circumstances—I'm definitely not saying it's a good general strategy). We poked holes in the opposing expert's theories, and the other side had no way to return fire and no reply report in which the fix the issues.

Judge Andrews addressed something like that last week in an opinion on a motion in limine. Defendant had offered expert …

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New Standard for Striking a Theory from a Rebuttal Expert Report

Andrew E. Russell, Sept. 4, 2020
Pennypack Discovery

Stop Sign
Luke van Zyl, Unsplash

This week, Judge Burke issued an interesting oral order on a discovery dispute about the admissibility of "new" expert opinions in rebuttal reports.

In the order, he sets forth a simple baseline test for what a party has to show to strike purportedly "new" expert opinions in a rebuttal report. To succeed in striking a "new" theory, a party must show at least:

(a) how they clearly disclosed that theory well before final . . . contentions were due . . . ; (b) how the same theory was thereafter found in their opening expert reports . . . ; and (c) how [the opposing party] never provided any substantive response to that theory until …
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Court Finds Late Doctrine of Equivalents Theory Prejudicial Because Adding DOE "Creates a New Ballgame"

Andrew E. Russell, July 31, 2020
Expert Discovery Pennypack

Remember these?
Remember these? Tim Gouw, Unsplash

It can be tough to get late-produced theories or evidence excluded in Delaware, because the Court must apply the permissive Pennypack factors that typically favor admission.

The factors include prejudice, ability to cure any prejudice, disruption of trial, and bad faith/willfulness.

But lately, the Court seems to be granting more motions to strike such theories. Today, Judge Andrews granted a motion to strike a late DOE theory offered for the first time in a reply report.

Judge Andrews Isn't Messing Around

He shot down the Pennypack factors in four short and to-the point paragraphs.

As to the first factor, he found prejudice because admission of a late theory requires …

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"Though the Pennypack factors may be very forgiving, they are not a sieve."

Andrew E. Russell, June 19, 2020
Discovery Dispute Pennypack

This is not an illustration of the Pennypack factors in action
This is not an illustration of the Pennypack factors in action Lindsay Cotter, Unsplash

I just came across the above quote, which is from a discovery dispute back in April where Judge Burke struck a very-late-disclosed witness.

It's an interesting—and accurate—description of the Pennypack factors. Most DE patent litigators are familiar with Pennypack, which set forth a loose set of factors for deciding whether to apply the "extreme" sanction of excluding "critical" evidence. Meyers v. Pennypack Woods Home Ownership Ass’n, 559 F.2d 894, 905 (3d Cir. 1977).

Even though Pennypack issued way back in 1977, modified versions of its list of factors are still applied today. When they come up, they most often favor the party producing …

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