Tennant took the case to the Crown Court in 1802 but lost again. In the intervening period, he came up with a new process, that was granted a patent No. 2312 on 30 April 1799 for a new bleaching powder (calcium hypochlorite). Tennant decided to open a new factory to commercially develop the product.

In 1799, Tennant, with three business partners, created the legal entity. The first of these, William Couper, was the legal advisor to the partnership. The