1792: published article in Annales de Chimie on decomposition of sodium chloride.
1800: abandoned pharmacie and moved to Paris. Set up a tannery using his new process.
21/11/04: Partnership with Jean Esther Berte and AA Cadet de Vaux to exploit his patent for a stove and chimney that would enable houses to be heated economically.
1805: began manufacturing alum near the church in Vaugirard--his alum known as 'alun curaudau' enjoyed a good reputation especially in Rouen. Either then, or later in partnership with Riffault.
In his inventaire après deces is described as 'professeur de pyrotechnie et de chimie.'