1922 - August Krogh secures permission to manufacture insulin
August and Marie Krogh travel to the United States from September to December, and he gives lectures. During the visit, Marie Krogh persuades August to visit the Canadian researchers Frederick Banting, Charles Best and John Macleod, who successfully produced insulin the year before. August Krogh stays at Macleod’s home on 23–25 November 1922 as a guest of the University of Toronto and meets the Insulin Committee, which holds the patent on insulin manufacture. The meeting goes well, and August Krogh receives permission to manufacture insulin in Scandinavia based on the method developed and patented in Canada on one condition: insulin must be made widely available and any profits from the sale of insulin must be used for scientific and humanitarian purposes.