Cooperative Patent Classification


CPC Definition - Subclass B28D

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Last Updated Version: 2017.08
WORKING STONE OR STONE-LIKE MATERIALS
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Working brittle material by laser beam

Working by grinding or polishing

Shaping clay or other ceramic compositions, slag, or mixtures containing cementitious material, e.g. plaster

Forming contours for artistic purposes, sculpturing

Glass manufacture, shaping, or supplementary processes

After-treatment of mortars, concrete, artificial stone or ceramics; treatment of natural stone

Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces

Machinery for, or methods of, mining or quarrying

Processes or apparatus adapted for the manufacture or treatment of semiconductor devices

Working stone or stone-like materials, e.g. brick, concrete {or glass}, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B28D 5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B 53/00)
References
Limiting references

This place does not cover:

Rotary drilling machines in general

Working by grinding or polishing

Portable percussive machines or tools

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Fine working of gems, jewels, crystals

Drill bits for earth or rock drilling

Rotary drilling machines for mining or quarrying

Informative references

Attention is drawn to the following places, which may be of interest for search:

Meat or bone saws

Surgical saws

Saws for dentistry

Sawing in general, sawing metal

Grinding edges of lenses

Grinders for cutting-off

Sawing wood or similar material

Forming contours for artistic purposes, sculpturing

Bits for picks or pick-holders for mining or quarrying

Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B23D 63/00; treating the cutting members of cutting machines to facilitate cutting B26D 7/08)
References
Limiting references

This place does not cover:

Dressing the tools of sawing machines or sawing devices

Treating the cutting members of cutting machines to facilitate cutting

Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor (working by grinding or polishing B24; for artistic purposes B44B)
References
Limiting references

This place does not cover:

Devices for removing chips fitted to machine tools in general

Grinding; Polishing

Fine working of gems, jewels, crystals for artistic purposes

Multi-step processes for fine working semiconductor material

Informative references

Attention is drawn to the following places, which may be of interest for search:

Working brittle material by laser beam

Processes or apparatus adapted for the manufacture or treatment of semiconductor devices

Accessories specially adapted for use with machines or devices of the preceding groups {(B28D 5/0058 takes precedence)}
References
Limiting references

This place does not cover:

Sawing stone with a circular saw blade or disc with the work mounted on a carriage

Devices for removing chips fitted to machine tools in general

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Breaking gems, jewels, crystals by bringing the workpiece into contact with a suitably shaped rigid body which remains stationary during breaking

Means for supporting or holding work during breaking of gems, jewels, crystals

Accessories specially adapted for use with machines for fine working of gems, jewels, crystals