Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 3992287 | Oil shale sorting Sorting of bicarbonate containing ore particles from oil containing ore particles in a mixture of the two types of ore particles by treating the surface of the mixture with an aqueous medium and thereafter subjecting the ore particles, while wet, to micro... | 11/16/1976 |
| 3985645 | Scheelite flotation A process for the separation of scheelite from calcite present in an ore or a concentrate formed from an ore, which process includes the steps of decomposing any flotation agent residues contained in the concentrate, and treating the ore or concentrate to... | 10/12/1976 |
| 3984920 | Tar sands conditioning drum A rotating drum type muller is described for initial conditioning of mined tar sands by the hot water method for separation of bitumen from the sands wherein ablation of mined tar sand lumps into pulp is effected through the addition of hot water, steam a... | 10/12/1976 |
| 3976563 | Dry reclamation of wire scrap A method for recovering plastic from plastic insulated wire scrap involving separating the plastic from short segments of the wire by agitating the segments in a heated dry powder medium until the metal is released from the plastic insulation, separating ... | 08/24/1976 |
| 3969225 | Differential separation of particulates by combined electro-static and radio frequency means A system and apparatus for separating different types of particulate materials selectively by subjecting a moving mixture of said materials to a combined applied direct current (D.C.) voltage and radio frequency (RF) electric field, thereby causing the pa... | 07/13/1976 |
| 3968572 | Conditioning drum for use in hot water separation of bitumen from mined tar sands A rotating drum type muller is described for initial conditioning of mined tar sands by the hot water method for separation of bitumen from the sands wherein ablation of mined tar sand lumps into pulp is effected through the addition of hot water, steam a... | 07/13/1976 |
| 3956106 | Apparatus and process for the production of grit free finely dispersed pigments An apparatus is provided for removal of grit from a finely dispersed solid containing gas stream serving for the pneumatic conveyance of this material, the apparatus comprising a closed separator housing having a funnel shaped lower portion, a supply tube... | 05/11/1976 |
| 3945809 | Method and apparatus for removing coarse unentrained char particles from the second stage of a two-stage coal gasifier A method and apparatus for removing oversized, unentrained char particles from a two-stage coal gasification process so as to prevent clogging or plugging of the communicating passage between the two gasification stages. In the first stage of the process,... | 03/23/1976 |
| 3936372 | Method for beneficiation of magnesite ore A method for beneficiation of magnesite ore wherein the ore is subjected to calcination to decrease the bulk density of the magnesite relative to the gangue. Accordingly, after such calcination, conventional gravimetric separations can be conducted with g... | 02/03/1976 |
