Title:
Gas detector
United States Patent 2573390


Inventors:
Andre, Blanchard
Application Number:
US68296146A
Publication Date:
10/30/1951
Filing Date:
07/11/1946
Assignee:
SCHLUMBERGER WELL SURV CORP
Primary Class:
Other Classes:
73/19.03, 73/19.09, 73/152.04, 73/590, 73/599, 340/632, 367/25, 367/83
International Classes:
G01N29/032
View Patent Images:
US Patent References:
2214674Method of logging wells1940-09-10
1935445Velocity measuring apparatus1933-11-14
1570781Testing apparatus and method1926-01-26