Is that so ? Then WHY does Raytheon have multiple patents REFERENCING Cyclones patents ? Surely a defense contractor with a $40 billion mkt cap doesn't file patents referencing processes that don't work?
Go on public pair on USPTO website > ALL patents paid < Also , Inline Crankshaft Journal not listed on website - us patent 20090223479 still valid & paid. Clearance volume valves patent also not listed.
Engine reversing control , centerfuge condenser patent only ones not still with Cyclone & is with Tca!
A couple of co's citing Cyclone patents: Daw Shien Scientific Research And Development, Inc. non profit