C23D1/00	7	Melting or fritting the enamels; Apparatus or furnaces therefor	C23D1/00	C23D1/00		38
C23D1/02	8	Granulating the melt; Drying the granules	C23D1/02	C23D1/02		16
C23D3/00	7	Chemical treatment of the metal surfaces prior to coating	C23D3/00	C23D3/00		456
C23D5/00	7	Coating with enamels or vitreous layers	C23D5/00	C23D5/00		1238
C23D5/005	8	{by a method specially adapted for coating special objects}	C23D5/00	C23D5/00		216
C23D5/02	8	by wet methods	C23D5/02	C23D5/02		680
C23D5/04	8	by dry methods	C23D5/04	C23D5/04		355
C23D5/06	8	producing designs or letters	C23D5/06	C23D5/06		256
C23D5/08	8	Applying enamels non-uniformly over the surface	C23D5/08	C23D5/08		66
C23D5/10	8	{with refractory materials}<br><br><u>WARNING</u><br> Group C23D5/10 is no longer used for classification. Documents are in the state of being reclassified to C23C4/10 and C23C24/10. 	C23D5/00	C23D5/10		105
C23D7/00	7	Treating the coatings, e.g. drying before burning	C23D7/00	C23D7/00		135
C23D9/00	7	Ovens specially adapted for firing enamels	C23D9/00	C23D9/00		258
C23D9/02	8	Non-electric muffle furnaces	C23D9/02	C23D9/02		22
C23D9/04	8	Non-electric tunnel ovens	C23D9/04	C23D9/04		46
C23D9/06	8	Electric furnaces	C23D9/06	C23D9/06		37
C23D9/08	8	Supporting devices for burning-bars	C23D9/08	C23D9/08		42
C23D9/10	8	Loading or unloading devices	C23D9/10	C23D9/10		52
C23D11/00	7	Continuous processes; Apparatus therefor	C23D11/00	C23D11/00		218
C23D13/00	7	After-treatment of the enamelled articles	C23D13/00	C23D13/00		144
C23D13/02	8	Removing defects by local re-melting of the enamel; Adjusting the shape	C23D13/02	C23D13/02		19
C23D15/00	7	Joining enamelled articles to other enamelled articles by processes involving an enamelling step	C23D15/00	C23D15/00		22
C23D17/00	7	De-enamelling	C23D17/00	C23D17/00		58
