If you are severe about an concept and want to see it turned into a completely fledged invention, it is essential to acquire some kind of patent protection, at least to the 'patent pending' status. Without having that, it is unwise to promote or market the thought, as it is simply stolen. Much more than that, businesses you approach will not get you significantly - as with out the patent pending status your concept is just that - an thought.

1. When does an concept grow to be an invention?

Whenever an thought gets to be patentable it is referred to as an invention. In practice, this is... […]