 America's patent laws held a great attraction for Schlumbohm after this first experience, and his later writings credit the patent regulations of the U.S. as the main reason for his relocation to the country, overcoming his distaste for the corporate mindset of American business.The improvement of refrigeration through chemical, mechanical, and engineered processes was Schlumbohm's perennial interest throughout his working life.Between 1929 and 1941, out of 44 patents filed, at least 26 were directly related to this topic.