Carl Friedrich Claus (9 November 1827 – 29 August 1900) was a German chemist and inventor.
A British patent for the Claus process was issued to him in 1883.
The process was later significantly modified by German company IG Farben[1] His first wife was Mary Claus (born Brown).
She had been living in Wiesbaden at least since 1878, and her daughters Elizabeth and Pauline have been with her at least since 1880–81, all three in Paulinenstraße Nr.
On 14 June 1900, the widower Claus, age 72, married in Hammersmith in the county of London his second wife, the spinster Caroline Barry.