A mold and method for forming a balloon for dilatation catheters, particularly balloons with a prismlike shape with a transverse polygonal cross section when the internal pressure is at atmospheric conditions. Upon inflation to higher internal pressures, the balloon assumes a normal circular cross section....http://www.google.ca/patents/US5163989?utm_source=gb-gplus-sharePatent US5163989 - Method for forming a balloon mold and the use of such mold
