DIFF Subgroup
F28F 13/18 by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Arrangements for modifying heat transfer, e.g. increasing, decreasing > by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
CPC:
Arrangements for modifying heat-transfer, e.g. increasing, decreasing (F28F1/00 - F28F11/00 take precedence) > by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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