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...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 |
| 7128005 | Non-polluting high temperature combustion system Disclosed is a non-polluting high temperature combustion system which comprises in combination a graphite-lined combustion chamber fueled by a controlled-burn thermite fuel, wherein the fuel burns a temperature of up to 6000 degrees Fahrenheit, wherein the resulting... | 10/31/2006 |
| 6627013 | Pyrotechnic thermite composition A thermite composition for pyrotechnics having high heat transfer charactistics comprising a strongly reducible metal oxide, a thermally decomposable heat transfer agent consisting of Cu2 O, and a strong reducing agent. It is desirable that the... | 09/30/2003 |
| 5241876 | Device for operating a wheelchair with one arm Disclosed is a device for operating a wheelchair with an occupant's use of one arm comprising a first member having structure to be engagably attached to the frame of the wheelchair and a second member movably attached to the first member such that when t... | 09/07/1993 |
| 4908887 | Mat assembly A portable, foldable liesure or utility mat comprising a plurality of elongated flexibly or hingedly connected ribs individually formed from a flat rigid core sandwiched between a lightweight insulating cushion material, said ribs of substantially equal d... | 03/20/1990 |
| 4571271 | Method of removing sediment from a large storage container Disclosed is a method of cleaning sediment from the bottom of a large storage container of clean water comprising sanitizing a cleaning person and a suction pump to remove the majority of skin viruses, germs, bacteria and dirt from the surface of his skin... | 02/18/1986 |
| 4386936 | Production of potassium chloride using pond crystallization Disclosed is a method of increasing and maintaining high concentrations of potassium chloride in a refinery process stream of brine containing potassium chloride, sodium chloride and a minor amount of salt impurities by mixing with a first process stream ... | 06/07/1983 |
| 4367208 | Process for the manufacture of battery carbon black A process useful for the production of a carbon black useful as an ingredient in dry cell battery compositions is disclosed which comprises heating a carbon black feedstock having a dibutylphalate absorption (DBP) ranging from 200 to 250 cc/100 g, nitroge... | 01/04/1983 |
| 4351815 | Battery carbon black Carbon black products useful as an ingredient in dry cell battery compositions are disclosed which have a wide aggregate size distribution with a range of measured aggregate volume from about 5×104 to about 1×109 nm3, a ... | 09/28/1982 |
| 4342736 | Reduction of the degradation of refractories in a carbon black reactor Disclosed is a method of producing carbon black by subjecting to a separation step a hydrocarbon feedstock containing a meltable solid, clarifying the hydrocarbon of the meltable solid and thereby making a concentrate of hydrocarbon and the meltable solid... | 08/03/1982 |
| 4325492 | Covered container A receptacle device comprising a tapered container having an opening and a cover pivotally attached to the opening in such a manner that the cover opens free of the opening so that a series of containers can be nested one within another without interferen... | 04/20/1982 |
| 4303174 | Foot operated container and covering device A receptacle device useful for receiving material, comprising a container having an opening, a covering pivotally mounted on the opening, and a substantially U-shaped operating member straddling the container and having at least one end rotatably connecte... | 12/01/1981 |
| 4297847 | Conversion of geothermal energy from subterranean cavities Geothermal energy is recovered by (1) introducing into a subterranean heat exchange medium which is in heat exchange with a high temperature formation a liquified vapor which will vaporize at the conditions of the medium; (2) vaporizing the liquified vapo... | 11/03/1981 |
| 4290650 | Subterranean cavity chimney development for connecting solution mined cavities Disclosed is a method of connecting two or more subterranean cavities in a deposit having a potassium chloride-rich stratum which contains sodium chloride and which is disposed above a potassium chloride-lean, sodium chloride-rich stratum. The method comp... | 09/22/1981 |
| 4284306 | Apparatus and method of mining subterranean rubble piles Disclosed is a method of solution mining the mineral content of a subterranean cavity containing a rubble pile positioned on the floor thereof and the subterranean cavity communicating with the surface by at least two boreholes, by drilling a liner throug... | 08/18/1981 |
| 4279026 | Seismographic data color display A new and improved method of forming a color graphic display from seismographic input data is disclosed. The input data sequence is processed to obtain the absolute value of each amplitude value and to select the maximum amplitude value of each oscillatio... | 07/14/1981 |
| 4276117 | Process of treating potassium chloride brine by evaporation and crystallization Disclosed is an improved method of producing potassium chloride by concentrating a brine thereof with respect to potassium chloride by multiple stage evaporation conducted at progressively higher temperatures, thereby precipitating other salts and thereaf... | 06/30/1981 |
| 4264104 | Rubble mining The invention disclosed herein relates to solution mining soluble ore deposits by creating a cavity substantially entirely filled with a deep bed of rubble. Solvent introduced at the top of the cavity is permitted to percolate downwardly through the rubbl... | 04/28/1981 |
| 4239287 | Solution mining potassium chloride from heated subterranean cavities Disclosed is a method of increasing the solution mining rate of potassium chloride from a cavity in a subterranean ore deposit containing potassium chloride and sodium chloride, in which cavity ore has been rubblized to effect a large contact surface area... | 12/16/1980 |
| 4239288 | Solution mining method utilizing sub-surface aquifer Disclosed is an improved method of solution mining a mineral from a subterranean deposit thereof, where an aqueous solvent is introduced into the deposit and a solution enriched in the mineral is withdrawn from the deposit through a conduit which traverse... | 12/16/1980 |
| 4232902 | Solution mining water soluble salts at high temperatures Subterranean formations of water soluble salt deposits are solution mined by introducing into the formation an aqueous solvent having a temperature substantially above the temperature of the deposit thereby heating the deposit and dissolving the soluble s... | 11/11/1980 |
| 4231840 | Method of concentrating an aqueous solution by multiple effect evaporating Disclosed is an improved method of concentrating an aqueous solution containing a first salt and a second salt, the solubility of the first salt increasing more with increasing temperature than the solubility of the second salt, by multiple effect evapora... | 11/04/1980 |
| 4224036 | Method of concentrating salt solutions Disclosed is an improved method of concentrating an aqueous solution containing a first salt and a second salt, the solubility of the first salt increasing more greatly with increasing temperatures than the solubility of the second salt, by multiple effec... | 09/23/1980 |
| 4224035 | Method of separating salts from solution Disclosed is an improved method of separating a first salt and a second salt from an aqueous solution containing both salts and salt impurities, where the solubility of the first salt increases more with increasing temperatures than the solubility of the ... | 09/23/1980 |
| 4224037 | Method for operating multiple effect evaporators Disclosed is an improved method of recovering a salt having a solubility which increases with increasing temperatures from a multiple salt aqueous solution also containing a salt having a solubility which increases less with increasing temperatures than t... | 09/23/1980 |
| 4210421 | Method for reducing kcl tailings loss from evaporation Disclosed is an improved method of concentrating with respect to a first salt an aqueous solution containing the first salt and a second salt, the solubility of the first salt increasing more with increasing temperatures than the solubility of the second ... | 07/01/1980 |
| 4192555 | Method of disposing solid sodium chloride while selectively solution mining potassium chloride Disclosed is a method of disposing solid sodium chloride while selectively solution mining potassium chloride from a subterranean deposit containing potassium chloride and sodium chloride. In this novel method an aqueous solvent saturated with respect to ... | 03/11/1980 |
| 4176165 | Treatment of alkyl lead-containing gas stream Method of removing alkyl lead from air and other gases by contacting said air or other gas with at least a catalytic amount of lead dioxide at temperatures in the range between 60° C. and 225° C.... | 11/27/1979 |
| 4157732 | Method and apparatus for well completion Well completion apparatus is prepared in such a manner that a first metal element and a second metal element of the apparatus will have the capability of acting as a galvanic couple when contacted intimately with an electrolyte. During a sufficient amount... | 06/12/1979 |
