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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 5223325 | Filter medium A fluid-permeable assembly for uniformly contacting a fluid with a bulk material has two mirror-symmetrically interfitting mats each having a generally planar fluid-permeable carrier web, another fluid-permeable web defining an array of protrusions unifor... | 06/29/1993 |
| 5066466 | Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space The present invention relates to a device for indicating toxic substances in air that is supplied to accommodation used for personnel, preferably the cab of a motor vehicle, this having error compensation for humidity and temperature in one or a plurality... | 11/19/1991 |
| 5015451 | Process, filter and device for making available high-quality breathing air The invention refers to a process, a filter, as well as a device for the elimination of bacteria and/or viruses and/or fungi and/or spores and/or germs and/or allergens and/or pollutants and/or odors, etc from the breathing air by means of a filter consis... | 05/14/1991 |
| 4941824 | Method of and apparatus for cooling and cleaning the roof and environs of a coke oven Coking emissions in the regions of the roof of the coke oven and adjoining lateral wall regions are removed by removing jets of fresh air from one longitudinal side to the other longitudinal side where the air, entraining the contaminant, is collected. Th... | 07/17/1990 |
| 4930407 | Sensing system for controlling air circulation valves in motor vehicles The invention relates to a sensor with integrated signal preconditioning and switching amplifier, whose switching point variably adjusts to slow variations in the output level of the sensor, in order to compensate for the slow influences of temperature an... | 06/05/1990 |
| 4886000 | Method of treating waste Household garbage, municipal waste, clarifier sludge and mixtures thereof continuously derived during summer months, for example, can be continuously mixed with a high volatiles coal and the resulting mixtures subjected to degasification at a temperature ... | 12/12/1989 |
| 4882287 | Process for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space The present invention relates to a process for indicating toxic substances in air that is supplied to accommodation used for personnel, preferably the cab of a motor vehicle, this having error compensation for humidity and temperature in one or a pluralit... | 11/21/1989 |
| 4875406 | Device for detecting different pollutants in gas streams A device for the detection of various pollutant contents in gas streams, preferably in the supply to motor vehicle cabins or protection cabins for operators, with use of one or several pollutant-detecting semiconductor gas sensors. A gas sensor (4) is alt... | 10/24/1989 |
| 4832936 | Process for making calcium sulfate dihydrate or gypsum A process is described for making flue gas gypsum from desulfurization of power plant exhaust gas. The process comprises treating the flue gas in a wash tower with a wash water suspension containing calcium oxide, calcium hydroxide or calcium carbonate an... | 05/23/1989 |
| 4802573 | Process for wet quenching of coke Wet quenching of coke with low vapor emissions is provided when the quenching vapors are bunkered before delivery to the atmosphere and subsequently or immediately a condensate is drawn off and cooled further. The bunkered vapors are intermittently mixed ... | 02/07/1989 |
| 4744289 | Cab for occupancy by individuals A cab which serves the occupancy of individuals, preferably in motor vehicles, which is equipped with an aerating and air removal system with integrated blower as well as a filter arrangement. The filter arrangement (3) consists of two filter packages (4,... | 05/17/1988 |
| 4742763 | Device for the detection of noxious substances in the air supplied to a compartment occupied by people One or more sensors are used for the indication and/or control and/or adjustment of filter devices and/or ventilation systems in relation with a measured value or respective measured values, established by the sensor, or respective sensors. In order to pr... | 05/10/1988 |
| 4733605 | Process and device for purifying polluted air A chemisorption filter is provided for receiving contaminated air to be filtered and partially heating the air while filtering same, with a further heater downstream of the chemisorption filter for further heating the air. A catalyst mass is traversed by ... | 03/29/1988 |
| 4670234 | Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants Process for stripping nitrogen oxides and sulphur oxides, as well as optionally other noxious elements from flue gas from combustion plants, preferably boilers of electric plants supplied with fossil fuels, the nitrogen oxides being reduced into elemental... | 06/02/1987 |
| 4551304 | Method of cleaning air loaded with pollutants Air is fed to a cabin after having been purified to remove sulfur dioxide, nitrogen monoxide, nitrogen dioxide, carbon monoxide and hydrocarbons therefrom, e.g. to serve a space occupied by a human. According to the invention, an ozonizer is provided to g... | 11/05/1985 |
| 4530817 | Apparatus for the protection of air fed to a labor-protection or vehicle compartment A chemisorption filter preceded by a heater is used to feed air to a vehicle passenger compartment or like cabin adapted to be occupied by a person. The chemisorption filter removes noxious and toxic ambient contaminants from the air before it is admitted... | 07/23/1985 |
| 4451435 | Apparatus for cleaning air loaded with pollutants Air is fed to a cabin after having been purified to remove sulfur dioxide, nitrogen monoxide, nitrogen dioxide, carbon monoxide and hydrocarbons therefrom, e.g. to serve a space occupied by a human. According to the invention, an ozonizer is provided to g... | 05/29/1984 |
| 4432776 | Process for filtering separators in dry chemisorption A process for cleaning filtering separators used in dry chemisorption systems. A maximum of 1-2% of the total filter area is in the cleaning process at any given time, to provide for utmost efficiency of the chemisorption activity. In the cleaning stage, ... | 02/21/1984 |
| 4366132 | Method of and apparatus for the chemisorptive scrubbing of waste gases A method of and an apparatus for the scrubbing of waste gases and especially combustion gases by chemisorption. According to the invention combustion gases which can contain sulfur dioxide are scrubbed with water in the presence of lime and the scrubbing ... | 12/28/1982 |
| 4335708 | Solar collector Solar collectors have flat plate-like foil tubes with permeable interlayers with lattice structure surfaces bonded to the foils of the tube. Several tubes with insulating backing are seam bonded together to form a sheet for covering a roof. Heat transfer ... | 06/22/1982 |
| 4080428 | Process for the purification of flue and other waste gas The invention is concerned with improved process and apparatus for the removal of sulphur dioxide from flue gas or other waste gas of the kind in which the waste gas is scrubbed by a circulating wash liquid containing lime suspensions, i.e. suspensions of... | 03/21/1978 |
| 4061479 | Apparatus for and method of separating droplets of a liquid from a gas This invention relates to the separation of droplets of a liquid (such as a washing liquid) from a gas, in which a stream of gas is conducted along a broad-fronted arcuate path, defined by interior and exterior walls, liquid droplets impinging upon the ex... | 12/06/1977 |
| 4061476 | Gas purification method and apparatus Pulverulent solid sorption agent is injected into a stream of noxious-contaminant-containing gas subjected to intensive turbulence and then separated from the gas. The solid sorption agent is optionally reused until exhausted, or purified before reuse. Ap... | 12/06/1977 |
