(under subclass 411.1) Product in which at least one layer contains (a bituminous or tarry residue*).
(1) Note. The residue from distillation of mineral oil and/or coal and from the destructive distillation of wood is considered to be a pitch; and a patent claiming a laminate including a layer of such material will be placed in this subclass.
(2) Note. The mere identification in the disclosure, of a material in a layer as an asphalt, tar, pitch or bitumen will be sufficient for placement of a patent in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
141+, and especially 143+ for a product, usually a roofing material which includes a layer or component saturated or coated with a bituminous or tarry material (including asphalt).
440, and 468, for a layered or composite product comprising bituminous or tarry material next to quartz or glass, or metal respectively. SEE OR SEARCH CLASS
427, Coating Processes,
138+, for a process of coating a pavement or the earth with asphalt, tar, bitumen or oil, subclasses 186+ for a process of producing a roofing element, usually including asphalt and subclass 443 for a process of coating, utilizing asphalt, bitumen, oil or wax.
442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),
258, 282, and 298 for a fabric including a bituminous material layer.
