Hans studied at Technical University of Berlin in Berlin, Germany.
After obtaining his Ph. Whereas Stammreich's wife Charlotte could directly travel to Brazil without problems, Hans was briefly arrested and put in a POW camp by the French Vichy government but was subsequently released and deported to Portugal, whence he left for Brazil. In Brazil, Stammreich became a professor for Physical Chemistry at the University of Sao Paulo, where he soon resumed his work in Raman spectroscopy.
Stammreich was an excellent experimentator, amongst many other innovations in 1956 he was the first to obtain Raman spectra with a Helium lamp. A detailed list of his scientific innovations can be found in the web article by Andre Trombetta cited below.