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US 4,374,744 AGranted
Stripping solution for tin or tin alloys
AssigneeMec Company Ltd.
InventorsYutaka Kawanabe, Takeyoshi Kishimoto
Life of this patent
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Abstract
A stripping solution for tin or tin alloys which comprises an inorganic and/or organic acid, an oxidizing agent and a heterocyclic compound free of a sulfur atom but containing a nitrogen atom in the form of .dbd.NH or .tbd.N as a ring-forming member.
Claims12
A stripping solution for tin and tin alloys comprising an inorganic and/or organic acid, an oxidizing agent and a heterocyclic compound free of sulfur but containing a nitrogen atom in the form of .dbd.NH or .tbd.N as a ring-forming member.
Dependencies are inferred from the claim text.