Law.com Subscribers SAVE 30%

Call 855-808-4530 or email [email protected] to receive your discount on a new subscription.

Maintaining Claim Scope after Johnson & Johnston

By Jack S. Barufka and Emily Bell
April 01, 2003

The Supreme Court's decision in Festo has been hailed by many as being one of the most significant cases to impact the patent system. Festo Corp. v. Shoektsu Kinzoku Kogyo Kabushiki Co., Ltd., 122 S.Ct. 1831 (2002). Some say that more significant than Festo is Johnson, in which the Federal Circuit held that subject matter disclosed but not claimed in a patent cannot be covered by the doctrine of equivalents. See Johnson & Johnston Associates Inc. v. R.E. Service Co., 285 F.3d 1046 (Fed. Cir. 2002) (en banc).

The claims at issue in Johnson are directed to a disposable substrate for use in manufacturing articles such as printed circuit boards. The specification says the substrate can be made of aluminum, stainless steel, nickel alloy, or polypropylene. In the claims, the substrate is made of aluminum. The alleged infringers used steel. The district court found that the defendants infringed under the doctrine of equivalents and that such infringement was willful. The Federal Circuit then reversed, holding that because the patentee disclosed but did not claim steel as a substrate, steel had been “dedicated to the public” and therefore could not be construed as an equivalent to aluminum.

Read These Next
New York's Latest Cybersecurity Commitment Image

On Aug. 9, 2023, Gov. Kathy Hochul introduced New York's inaugural comprehensive cybersecurity strategy. In sum, the plan aims to update government networks, bolster county-level digital defenses, and regulate critical infrastructure.

The Bankruptcy Hotline Image

Recent cases of importance to your practice.

The DOJ's Corporate Enforcement Policy: One Year Later Image

The DOJ's Criminal Division issued three declinations since the issuance of the revised CEP a year ago. Review of these cases gives insight into DOJ's implementation of the new policy in practice.

How AI Has Affected PR Image

When we consider how the use of AI affects legal PR and communications, we have to look at it as an industrywide global phenomenon. A recent online conference provided an overview of the latest AI trends in public relations, and specifically, the impact of AI on communications. Here are some of the key points and takeaways from several of the speakers, who provided current best practices, tips, concerns and case studies.

Use of Deferred Prosecution Agreements In White Collar Investigations Image

This article discusses the practical and policy reasons for the use of DPAs and NPAs in white-collar criminal investigations, and considers the NDAA's new reporting provision and its relationship with other efforts to enhance transparency in DOJ decision-making.