Dr. Jan Constant Janssen (18 September 1895 – 15 April 1970) was a Belgian physician and businessman. He was the third child (out of four) of Adriaan Victor Janssen (1854–1942) and Anna Catharina Eelen (1855–1929). He went to high school in Hoogstraten and studied medicine at the Catholic University of Leuven and the University of Ghent. On 16 April 1925, he married Margriet Fleerackers (5 January 1897 – 23 September 1973), together they had four children. Their oldest son, Paul Janssen, would become one of the most successful scientists in pharmaceutics.
Career
He started his career as a family physician in Turnhout, but in addition he was interested in business too. In 1921, he met Ladislas Richter in Vienna, who was the son of Gedeon Richter, who owned a pharmaceutical factory in Budapest, Hungary. In 1933, he acquired the right to distribute the pharmaceutical products of Richter, the Hungarian pharmaceutical company, for Belgium, the Netherlands and Belgian Congo. On 23 October 1934, he founded the N.V. Produkten Richter in Turnhout. In 1937 Constant Janssen acquired an old factory building in the Statiestraat 78 in Turnhout for his growing company, which he expanded during World War II into a four-storey building. In 1938 he closed his practice as a family physician and concentrated his effort of the expansion of his pharmaceutical business. His wife managed the production, quality control, and the administration of the company.
Still a medical student, his son Paul Janssen helped with the development of Perdolan. After World War II, the brandname of the products was changed into Eupharma, and later the company would evolve into Janssen Pharmaceutica.
Sources
Dirk Collier (Ed.), Dr. Constant Janssen, Janssen Pharmaceutica, 1996
December 31, 2022
constant, janssen, september, 1895, april, 1970, belgian, physician, businessman, third, child, four, adriaan, victor, janssen, 1854, 1942, anna, catharina, eelen, 1855, 1929, went, high, school, hoogstraten, studied, medicine, catholic, university, leuven, un. Dr Jan Constant Janssen 18 September 1895 15 April 1970 was a Belgian physician and businessman He was the third child out of four of Adriaan Victor Janssen 1854 1942 and Anna Catharina Eelen 1855 1929 He went to high school in Hoogstraten and studied medicine at the Catholic University of Leuven and the University of Ghent On 16 April 1925 he married Margriet Fleerackers 5 January 1897 23 September 1973 together they had four children Their oldest son Paul Janssen would become one of the most successful scientists in pharmaceutics Career EditHe started his career as a family physician in Turnhout but in addition he was interested in business too In 1921 he met Ladislas Richter in Vienna who was the son of Gedeon Richter who owned a pharmaceutical factory in Budapest Hungary In 1933 he acquired the right to distribute the pharmaceutical products of Richter the Hungarian pharmaceutical company for Belgium the Netherlands and Belgian Congo On 23 October 1934 he founded the N V Produkten Richter in Turnhout In 1937 Constant Janssen acquired an old factory building in the Statiestraat 78 in Turnhout for his growing company which he expanded during World War II into a four storey building In 1938 he closed his practice as a family physician and concentrated his effort of the expansion of his pharmaceutical business His wife managed the production quality control and the administration of the company Still a medical student his son Paul Janssen helped with the development of Perdolan After World War II the brandname of the products was changed into Eupharma and later the company would evolve into Janssen Pharmaceutica Sources EditDirk Collier Ed Dr Constant Janssen Janssen Pharmaceutica 1996 Retrieved from https en wikipedia org w index php title Constant Janssen amp oldid 1124763784, wikipedia, wiki, book, books, library,
