Submarine patent

From Academic Kids

Submarine patent is an informal legal term for a patent published long after the original application was filed. Like a submarine, it stays under water, i.e. unpublished, for long, then emerges, i.e. is granted and published, and surprises the whole market. This practice is generally only possible under the US patent law, and to a very limited extent since the US signed WTO's TRIPs agreements, making compulsory the publication of patent applications 18 months after their filing or priority date. Submarine patents are considered by many as a procedural lache (a delay in enforcing one's rights, which may cause the rights to be lost).

Contents

United States

In the past, i.e. before US patent applications were automatically published 18 months after their filing or priority date, an applicant for a US patent could delay the grant of the patent by filing a succession of continuation applications. Some submarine patents emerged some 40 years after the date of filing of the corresponding application.

Currently, all US patent applications are published 18 months after the filing date except for US patent applications for which the applicant explicitly certifies at the filing date that he will not file corresponding patent outside the US (in a recent report though the National Academy of Sciences has recommended that "in all cases, applications should be published during patent examinations" [1] (http://www4.nationalacademies.org/news.nsf/isbn/0309089107?OpenDocument)).

Europe

Under the European Patent Convention (EPC), the submarine patent strategy is in theory and in practice, until otherwise proven, impossible to carry out. Pursuant to Art. 93 EPC[2] (http://www.european-patent-office.org/legal/epc/e/ar93.html#A93) indeed, "a European patent application shall be published as soon as possible after the expiry of eighteen months after the date of filing or, if priority has been claimed, as from the date of priority". As soon as the 18 month period elapsed, provided that the patent application has not been refused, withdrawn or deemed to be withdrawn, the publication is unconditional.

Famous submarine patent owners

Jerome H. Lemelson filed a lot of applications that became submarine patents. He and his heirs have collected over 1.3 billion dollars (U.S.) in royalties. Many of these patents, covering machine vision and bar codes, were struck down in January 2004 by the federal district court in Las Vegas, Nevada:

"At a minimum, Lemelson's delay in securing the asserted claims amounts to culpable neglect as he ignored the duty to claim his invention properly.... If the defense of prosecution laches does not apply under the totality of circumstances presented here, the Court can envision very few circumstances under which it could.... In sum, Lemelson's delay in securing the asserted patent claims is unexplained and unreasonable."

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