One aspect of the present invention are
firelogs manufactured with an integral combustion shield for covering a portion of the surface area of the firelog that may be selectively utilized to set the duration and burning rate as the manufactured firelog is consumed during the fire. By way of example and not of limitation, the
integral combustion shield is made of a thin flame resistant or non-flammable material, such as aluminum, which covers a portion of the firelog to control the combustion rate. -
https://patents.justia.com/patents-by-us-classification/44/5...