Fire extinguisher in the early 60s and Purple-K being developed by the US Navy in the late 1960s. Manually applied dry agents such as graphite for class D (metal) fires had existed since WWII, but it wasn't until 1949 that Ansul introduced a pressurized extinguisher using an external CO2 cartridge to discharge the agent. Met-L-X (sodium chloride) was the first extinguisher developed in the US, with graphite, copper, and several other types being developed later. In the 1970s, Halon 1211 came over to the United States from Europe where it had been used since the late 40s or early 50s. Halon 1301
Chubb Fire for tackling cooking oil fires, and the Pyromet™ extinguisher for fighting Class D metal fires. Each product is available with ancillary equipment including stands, mobile trolleys, and internal/external covers. Chubb Fire Chubb Fire & Security is a fire and security business. It is owned by United Technologies Corporation. Read and Campbell, the oldest company of those which came together to form Chubb Fire Security Limited. Their invention of the CO2 Cartridge to expel the contents of a fire extinguisher is still today the most common method in use. Read and Campbell are mainly remembered for their 'Waterloo' and 'Petrolex' brand