WORKING STONE OR STONE-LIKE MATERIALS

Informative references

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

Working brittle material by laser beam	B23K 26/4075
Working by grinding or polishing	B24
Shaping clay or other ceramic compositions, slag, or mixtures containing cementitious material, e.g. plaster	B28B
Forming contours for artistic purposes, sculpturing	B44B
Glass manufacture, shaping, or supplementary processes	C03B
After-treatment of mortars, concrete, artificial stone or ceramics; treatment of natural stone	C04B 41/00
Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces	E01C 23/00
Machinery for, or methods of, mining or quarrying	E21C
Processes or apparatus adapted for the manufacture or treatment of semiconductor devices	H01L 21/00

Working stone or stone-like materials, e.g. brick, concrete [N: or glass], not provided for elsewhere; machines, devices, tools therefor (fine working of gems, jewels, crystals B28D5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B53/00)

References relevant to classification in this group

This subclass/group does not cover:

Working by grinding or polishing	B24
Portable percussive machines or tools	B25D
Rotary drilling machines in general	B23B

Fine working of gems, jewels, crystals	B28D 5/00
Drill bits for earth or rock drilling	E21B 10/00
Rotary drilling machines for mining or quarrying	E21C 1/00

Informative references

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

Meat or bone saws	A22B 5/20
Surgical saws	A61B 17/14
Saws for dentistry	A61C 3/12
Sawing in general, sawing metal	B23D 45/00 - B23D 65/04
Sawing wood or similar material	B27B
Grinders for cutting-off	B24B 27/06
Grinding edges of lenses	B24B 9/14
Bits for picks or pick-holders for mining or quarrying	E21C 35/18
Forming contours for artistic purposes, sculpturing	B44B

Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B23D63/00; treating the cutting members of cutting machines to facilitate cutting B26D7/08)

References relevant to classification in this main group

This subclass/group does not cover:

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

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 relevant to classification in this main group

This subclass/group does not cover:

Devices for removing chips fitted to machine tools in general	B23Q 11/0042
Grinding; Polishing	B24
Fine working of gems, jewels, crystals for artistic purposes	B44B
Multi-step processes for fine working semiconductor material	H01L 21/00

Informative references

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

Processes or apparatus adapted for the manufacture or treatment of semiconductor devices	H01L 21/00
Working brittle material by laser beam	B23K 26/4075

Accessories specially adapted for use with machines or devices of the preceding groups [N: (B28D5/0058 takes precedence)]

References relevant to classification in this main group

This subclass/group does not cover:

Devices for removing chips fitted to machine tools in general	B23Q 11/0042
Sawing stone with a circular saw blade or disc with the work mounted on a carriage	B28D 1/047

Breaking gems, jewels, crystals by bringing the workpiece into contact with a suitably shaped rigid body which remains stationary during breaking	B28D 5/0041
Means for supporting or holding work during breaking of gems, jewels, crystals	B28D 5/0052
Accessories specially adapted for use with machines for fine working of gems, jewels, crystals	B28D 5/0058