US PATENT SUBCLASS 428 / 446
.~ Of silicon containing (not as silicon alloy)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
446.~ Of silicon containing (not as silicon alloy) {6}
447  DF  .~.~> As siloxane, silicone or silane
448  DF  .~.~> As intermediate layer {1}
450  DF  .~.~> Next to metal
451  DF  .~.~> Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
452  DF  .~.~> Next to cellulosic {1}
454  DF  .~.~> Sand, clay or mica (silica excluded)

DEFINITION

Classification: 428/446

(under subclass 411.1) Product with at least one layer having as an ingredient a material which contains the element silicon in any form, i.e., elemental or in a compound.

(1) Note. A product comprising an alloy or an intermetallic compound which has silicon as an element thereof is excluded from this definition and will be found in subclasses 457+.

(2) Note. This subclass and its indents, especially subclass 454 will take a patent to a nonstructural laminate claiming clay*, cement*, sand* or vitreous* substances which do not fit the definition of glass*, but are silicon containing.

(3) Note. A patent claiming mica* (as a constituent of a second layer) will normally be considered to claim mica flakes (flat) and as such is considered to define structure of such flakes and will be placed in subclass 324. If the mica is disclosed as ground or pulverized and is a constituent of a second layer, and structurally defined, such a patent will also be placed in subclass 324. If no structure of the ground or pulverized mica recited, a laminate containing such mica will be placed in subclass 454.

(4) Note. Special exception in regard to silicon and metallic stock material in Class 29. For purpose of Class 29, subclasses 180+ silicon is considered to be a metal. See also class definition, Glossary, for nonstructural terms or Composition-definition of Metal and Relation to Other Classes, B, reference to Class 29.

SEE OR SEARCH THIS CLASS, SUBCLASS: 144+, and 149+, for a product comprising a continuous, but nonuniform or irregular surface made by a layer of particulate matter which could be a silicon containing material such as crushed stone, etc., or as a coating on particulate matter.

204, 206+, 308, 331, 387, 404+, and 428, for other products containing silicon in elemental or compound form, either in the form of particulate matter, (e.g., pigment, etc.) or as glass, or as a coating or impregnant, as appropriately titled.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

39+, for silicon-containing material adapted to form a lamina.

427, Coating Processes, appropriate subclasses, especially those having "silicon", "glass" or "vitreous" in their title for the process of making a silicon containing multi-layer product by a process of that class.

526, Synthetic Resins or Natural Rubbers,

279, for a silicon-containing resin, per se.

528, Synthetic Resins or Natural Rubbers,

10, 43 for silicon-containing resin, per se.