Classification opinions
… sodium aluminosilicates, crystalline, whether or not having a constant ratio of elements, but containing binders. … oil-well casings, etc.). Adoption : 1998 … 8. Disposable hand or foot warmer, comprising a porous, plastics-coated … reaction) over a period of 5 to 7 hours, for warming the hands or feet during cold-weather activities. Application of …