A method for compressing gases in a contained volume consisting of hollow glass microspheres is described. The gases are compressed under high pressure and can be easily handled and stored. The gases to be compressed and contained in the microspheres are used as blowing gases to blow the microsphere...http://www.google.de/patents/US4303432?utm_source=gb-gplus-sharePatent US4303432 - Method for compressing gaseous materials in a contained volume
