Extracting a portion of material from a borehole using a sampler with pivoting gate valve
A Standard patent application filed on 25 August 1987 credited to Quam, Bradley A.
Details
Application number :
77429
Application type :
Standard
Application status :
WITHDRAWN
Under opposition :
No
Proceeding type :
Invention title :
Extracting a portion of material from a borehole using a sampler with pivoting gate valve