Title:
Well heater
United States Patent 2500513
US Patent References:
/0421883.html
- - 0421883
/1309721.html
- - 1309721
Electrical heater for oil wells
- - 1504208
Portable circulation and heating apparatus for tanneries
- - 1841068
Apparatus for clearing wells
- - 2244256
/0421883.html
- - 0421883
/1309721.html
- - 1309721
Electrical heater for oil wells
- - 1504208
Portable circulation and heating apparatus for tanneries
- - 1841068
Apparatus for clearing wells
- - 2244256
Inventors:
Bowman, Hyman D.
Publication Date:
03/14/1950
View Patent Images:
Export Citation:
Assignee:
Bowman, Hyman D.
Primary Class:
Other Classes:
166/214, 392/301, 166/243, 219/523, 166/60
International Classes:
E21B36/04; E21B36/00