CPC Subgroup Additional Only
H01J 2209/265 Surfaces for sealing vessels
Full Title
Apparatus and processes for manufacture of discharge tubes > Sealing parts of the vessel to provide a vacuum enclosure > Surfaces for sealing vessels
2 direct subcodes
Child Classifications
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- H01J 2209/267 shaped surfaces or flanges
- H01J 2209/268 treated surfaces and surface preparations, e.g. to improve adhesion