In June 1998 SUPERGAS submits an application to the Danish National Patent Agency. It turns out that the invention can be patented. SUPERGAS go on to apply for a general PCT application in May 1999. The reason for playing along with the international system of patents, which is in itself highly problematic, was not a fear of potential copying but to generate interest in the project from investors by showing its serious business potential. “The claimed invention relates to a system for the anaerobic treatment of fluid organic material. The object of
the claimed invention is to provide a biogas system that does
not require a supply of electricity. This object is achieved by a
pressure-controlled, pressure-equalising device integrated in the system, which device functions without external power.”
A PCT patent has been granted in several countries.