Charles Steele is one of 172 Purdue University researchers who received patents in 2025.

Steele, who is the forensic science coordinator at Purdue Northwest, sought a patent for Portable Detection and Quantification Method for Delta 9 THC. The patent is for new methods for drug testing.

Purdue University was seventh in the nation and 12th worldwide for the number of patents received in 2025, according to a report from the National Academy of Inventors.

“Purdue and its robust innovation ecosystem continue to pursue excellence at the highest scale, reflected in our ranking as a top 10 university for U.S. patents received for six years in a row,” Purdue President Mung Chiang said in a press release. “Purdue Innovates accelerates support for Boilermaker inventors as they translate breakthrough research into real‑world impact, with outstanding support from the office of technology commercialization.”

Steele also is a visiting instructor of physical science at PNW, and mentors students who are conducting research.

“I often describe my life as day camp without the adult supervisor where each day brings something new,” Steele said in the PNW website. “In my spare time, I am working on a cookbook; I have a few of my own product lines on the market; and my music has been heard on all seven continents. I have also been fencing since I was a teenager.”

Steele also has sought a patent for a fingerprinting system, and started CBF Forensics in 2023.

Purdue Innovates offers a platform for innovators who are seeking support and resources.