Most of the patents have expired for failure to pay maintenance fees.
The "Schoell cycle heat regenerative engine" has never been demonstrated to work, not after 12 years and more than $25 million in operating losses sunk into its development.
Raytheon took delivery of their two prototypes in 2012 after delays, but got stripped down, low performance engines rather than the high performance engines promised. Raytheon never mentioned those engines or that project since.
The Mark 5 engine covered by the patents was originally promised for delivery to a customer in January 2010. Cyclone ended up paying out $400,000 in late delivery penalties before that customer cancelled the order.
Combilift of Ireland ordered two Mark 5 engines in September 2011 for delivery in July 2012. The engines are required to run for 50 hours without failure before Combilift will accept them. The engines still haven't been made to run for 50 hours. They still aren't delivered.
Meanwhile, Cyclone has stripped almost all the patented features of the Mark 5 engine in an attempt to make it work right. The last mention of work being done on the Mark 5 engine was in February 2015 (
) They just can't make it work.
The generator for the Army was delivered (years late), but no details of the performance have been given out. Meanwhile, companies have successfully converted Honda generators to run on JP8, so the Army has no more interest in Cyclone.
Cyclone Performance spent hundreds of thousands to build a land speed record race car. It has never moved one foot under its own power. The engine doesn't work well enough.
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