DIFF Subgroup
E21B 34/08 responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence)
Introduced: January 1980
Title
Titles differ between systems:
IPC: responsive to flow or pressure of the fluid obtained
CPC: responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Valve arrangements for boreholes or wells > in wells > responsive to flow or pressure of the fluid obtained
CPC:
Valve arrangements for boreholes or wells > in wells > responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open