You may also be surprised to know that there have been other individuals who have also attempted to patent similar technology and have all died under similarly suspicious circumstances. Stan Meyer and Tom Ogle also came up with cars that circumvented gas and they both ended up dead.
Considering the US Gov has no problem with collateral damage when going after a target (ie Iraq - 1 million civilian casualties) this seems par for the course.
Keep in mind also that with the declassified MK Ultra program the Gov. has been studying mind control and making Manchurian Candidates for nearly a hundred years.
In the words of the late great George Carlin -"I have certain rules I live by, Rule #1 I don't believe anything the government tells me"