Subclass	Subgroup	Patent
C01B	3/0015	12662374
	3/34	12662375
	7/0712	12662376
	11/024	12662377
	21/0825	12662378
	23/0052	12662379
	32/158	12662380
	32/198	12662381
	32/25	12662382
	32/90	12662383
	32/991	12662384
	33/124	12662385
	33/18	12662386
	33/193	12662387
C01C	1/0482	12662388
C01D	15/04	12662389
C01F	17/276	12662390
C01G	21/006	12662391
	53/40	12662392
	53/50	12662393