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Dupage Policy Journal

Sunday, August 24, 2025

Which patent granted in Addison in week ending Aug. 7 took the longest?

The longest time between a patent being filed and granted in the week ending Aug. 7 in Addison was 810 days, according to the United States Patent and Trademark Office.

The patent application was filed by Sandisk Technologies, LLC for a non-volatile memory with countermeasure for over programming. It was filed on May 16, 2019 before being approved on Aug. 3, 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 20 patents granted for Addison inventors in the week ending Aug. 7.

Longest patent application period in Addison for week ending Aug. 7
Applicant NameFiling DateGranted Date
Sandisk Technologies, LLC2020-03-302021-08-03
Sandisk Technologies, LLC2020-06-122021-08-03
Sandisk Technologies, LLC2020-02-242021-08-03
Sandisk Technologies, LLC2020-06-262021-08-03
Sandisk Technologies, LLC2020-06-262021-08-03
Sandisk Technologies, LLC2020-06-222021-08-03
Sandisk Technologies, LLC2020-04-072021-08-03
Sandisk Technologies, LLC2019-12-032021-08-03
Sandisk Technologies, LLC2019-06-182021-08-03
Sandisk Technologies, LLC2019-12-112021-08-03
Sandisk Technologies, LLC2020-05-222021-08-03
Sandisk Technologies, LLC2019-10-302021-08-03
Sandisk Technologies, LLC2020-06-162021-08-03
Sandisk Technologies, LLC2020-06-152021-08-03
Sandisk Technologies, LLC2019-12-052021-08-03
Sandisk Technologies, LLC2020-10-092021-08-03
Sandisk Technologies, LLC2019-05-162021-08-03
Sandisk Technologies, LLC2020-03-242021-08-03
Sandisk Technologies, LLC2020-04-292021-08-03
Sandisk Technologies, LLC2019-06-262021-08-03

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