US PATENT SUBCLASS 264 / 413
.~ Producing or treating porous product

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

405  DF  DIRECT APPLICATION OF ELECTRICAL OR WAVE ENERGY TO WORK (E.G., ELECTROMAGNETIC WAVE, PARTICULATE, MAGNETIC, INDUCTION HEAT, SONIC, ELECTROSTATIC ENERGY, ETC.) {26}
413.~ Producing or treating porous product {5}
414  DF  .~.~> Inorganic material containing
415  DF  .~.~> Including in situ (e.g., foaming) {3}
423  DF  .~.~> Plasma (e.g., corona, glow discharge, etc.)
424  DF  .~.~> Utilizing electron arc or electron beam
425  DF  .~.~> Polymerizing, cross-linking, or curing

DEFINITION

Classification: 264/413

Producing or treating porous product:

(under subclass 405) Processes wherein the directly applied energy is used (a) to form pores or voids in an article or (b) for the treatment* of a porous article.

(1) Note. Pore forming when not combined with significant molding is provided for in various classes and the general lines between those classes and Class 264 is followed even though the step of forming pores is recited.

(2) Note. Included within the scope of this subclass and indented subclasses are enlarging voids already present in a material by expanding gases contained therein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, For processes of forming pores or voids without using the direct application of electrical or wave energy.

317, for processes, generally, which involve the destruction of material which may leave a space or void.

321, for processes of reshaping previously foamed material.

610, for processes of burning, vaporizing, or melting of embedded element or core to form a nonrandom void

628, for processes of producing microporous articles without intentionally occluding or incorporating void forming elements randomly throughout the forming material.

SEE OR SEARCH CLASS

51, Abrasive Tool Making Process, Material, or Composition,

296, for pore forming in abrasive materials.

106, Compositions: Coating or Plastic,

122, 601+, and 672+ for pore forming, per se, in compositions within the definitions of the class.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

77+, for a pore forming step in combination with a laminating operation.

162, Paper Making and Fiber Liberation,

101, for a pore forming step within the class definition.

366, Agitating, 3+, for a step of utilizing gas in mixing mortar.

501, Compositions: Ceramic,

39, and 80+ for pore-forming ceramic compositions.

521, Synthetic Resins or Natural Rubbers,

50+, for pore forming, per se, in a synthetic resin or natural resin composition.

588, Hazardous or Toxic Waste Destruction or Containment,

255, for the forming of pores or voids in the production of a material containing hazardous or toxic waste for purposes of containment.