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Dupage Policy Journal

Saturday, August 23, 2025

Week ending Aug. 21: longest patent process for Carol Stream inventors

The longest time between a patent being filed and granted in the week ending Aug. 21 in Carol Stream was 718 days, according to the United States Patent and Trademark Office.

The patent application was filed by A. J. Antunes & Company for an automated bun handling system. It was filed on Aug. 30, 2019 before being approved on Aug. 17, 2021.

It was the only patent approved in the week ending Aug. 21 from Carol Stream.

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.

Longest patent application period in Carol Stream for week ending Aug. 21
Applicant NameFiling DateGranted Date
A. J. Antunes & Company2019-08-302021-08-17

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