| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 392407000 |
Radiant heater
| 280 |
| 392386000 |
Vaporizer
| 257 |
| 392465000 |
Continuous flow type fluid heater
| 253 |
| 392441000 |
Tank or container type liquid heater
| 129 |
| 392347000 |
Convection space heater
| 98 |
| 392307000 |
Combined with nonelectric heating means (e.g., gas, etc.)
| 35 |
| 392379000 |
Concentrated heated air stream (i.e., blast)
| 35 |
| 392311000 |
Fluid-in-circuit type heater
| 28 |
| 392497000 |
Immersion heater details
| 16 |
| 392339000 |
With heat storage means
| 10 |
| 392301000 |
Borehole type | 2 |
| 20140099084 | Downhole Wellbore Heating System and Method - Embodiments of the invention provide systems and methods for heating a wellbore environment. One or more electric heating cables are attached to an elongated support member, such as a wire rope, so that the support member receives and relieves the heating cables of a mechanical load. The attachment may be with two-piece clamps spaced at regular intervals along the support member. The heating cables and support member may be disposed in coiled tubing within the wellbore. The coiled tubing can be pressure-sealed and filled with a dielectric fluid. The heating cables and support member can be attached to a cable hang-off having a plurality of wedge-shaped slips that cooperate with a bowl to form a pinching member that grips the support member and suspends the support member and heating cables in the wellbore. The methods include methods for manufacturing and installing the heating apparatus. | 04-10-2014 |
| 20110170843 | GROUPED EXPOSED METAL HEATERS - A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters. The group includes two or more heaters placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the formation. The openings include at least partially uncased wellbores in a hydrocarbon layer of the formation. The groups are electrically configured such that current flow through the formation between at least two groups is inhibited. The heaters are configured to provide heat to the formation. | 07-14-2011 |
