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Long haul: longest wait for Downers Grove inventor's patents approved in week ending Sept. 25

The longest time between a patent being filed and granted in the week ending Sept. 25 in Downers Grove was 421 days, according to the United States Patent and Trademark Office. ....

United States , Dennis Crouch , Trademark Office , Vertec Biosolvents Inc , Downers Grove , United States Patent , Vertec Biosolvents , Intellectual Property , Dupage Policy Journal ,