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Dupage Policy Journal

Thursday, August 21, 2025

How long did Lombard inventors wait for patents granted in week ending Aug. 21?

The longest time between a patent being filed and granted in the week ending Aug. 21 in Lombard was 761 days, according to the United States Patent and Trademark Office.

The patent application was filed by Vertiv Energy Systems, Inc. for a dC-DC converters having DIN rail mounts. It was filed on July 18, 2019 before being approved on Aug. 17, 2021.

Though patents are required for inventions and products, the granting of a patent is not a guarantee for success. Dennis Crouch, co-director of the Center for Intellectual Property & Entrepreneurship said roughly 50 percent of patents expire prematurely due to costs.

There were two patents granted for Lombard inventors in the week ending Aug. 21.

Longest patent application period in Lombard for week ending Aug. 21
Applicant NameFiling DateGranted Date
Vertiv Energy Systems, Inc.2019-07-182021-08-17
Vertiv Energy Systems, Inc.2019-09-122021-08-17

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