Mark Sullivan believes that gold and other resources can be harnessed using the energy from the Earth’s rotation. He has dedicated many years working on The Sullivan Generator to prove his theory and took it to Shark Tank. His pitch is considered to be one of the craziest in Shark Tank history and wasn’t able to get a deal. Over a decade later and The Sullivan Generator is worth an estimated $100,000.
Mark Sullivan The Serial Inventor
Mark Sullivan is from San Antonio, Texas and has a degree in physics and biomedical engineering. There’s not much information about his background but he is a serial inventor with multiple patents. Sullivan claims to have made over 1,000 inventions during his career.
It’s easy to see why people often question his legitimacy, but one can’t deny Mark’s intelligence. Although not every claim can be verified, some of his creations were granted patents.
A Generator That Produces Gold?
As a visionary, Sullivan was always looking for a revolutionary idea to make his mark on the world. He tried harnessing the Coriolis Effect, or the force produced by the spin of the Earth, working on it for many years.
Mark theorized that hurricanes have enough energy to power a device that has gold, manganese, electricity, and drinking water as by-products. He tried designing a machine that could make synthetic storms and called it “The Sullivan Generator.”
The device collects salt water, turns it into water vapor, and takes it to a vortex chamber. This supposedly turns on the turbines that run the entire process. Mark applied for a patent to protect his intellectual property but had no funds to start manufacturing.
One of Shark Tank’s Most Memorable Pitches
Mark Sullivan wanted to share his idea in the best way possible. He chose to do it on season three of Shark Tank and was seeking $1 million for a 10% equity stake.
The pitch was filled with scientific jargon, which confused the Sharks. The look on Barbara’s and Daymond’s faces during the pitch was priceless. The Sharks showed some interest when the presenter mentioned gold was one of the by-products.
But no matter how hard they tried to understand the product, it just didn’t make sense to them. It sounded too good to be true and its science was unreliable. The Sharks had fun with Mark, but no deals were made.
The Sullivan Generator Today
After his rejection, Mark tried pitching his idea to the South Texas Mensa Society, but nothing came of it. As of 2026, no working prototype of the Sullivan Generator has ever been built, no investment has followed, and the device is widely regarded as non-viable. The patent remains a legal document, but the generator exists only on paper.
According to Steve Hench on Quora, The Sullivan Generator isn’t feasible because “The Coriolis effect does represent a source of directly harvestable energy.” The cost of building, installing and operating such a device big enough to even attempt this would be unrealistic.
That hasn’t stopped Sullivan from continuing to invent. He has since opened a children’s healthcare clinic in Austin called Aunt Betty’s Infirmary, which provides care for kids recovering from illness or surgery and for long-term medically fragile children.
He still maintains his website marksullivanresearch.com, which covers his many research projects and inventions including the Sullivan Generator, though the generator itself is not available for purchase. Sullivan has claimed involvement in industries ranging from aerospace and the NFL to urban design and dentistry.
The Sullivan Generator is worth an estimated $100,000. Despite not getting a deal, it’s definitely one of the more memorable pitches. Also, I like how the Sharks had a laugh and didn’t humiliate him like they would on other reality TV shows.
