A mineral interest means the interest which is created by an instrument transferring, either by grant, assignment, or reservation, or otherwise an interest, of any kind, in any subsurface mineral.
RCW 78.22.020
"Mineral interest" defined.
1984 c 252 s 2.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.