1
Halloran John J: Air purifier. Environmental Technology Corporation, July 10, 1973: US3744216 (115 worldwide citation)

An air purifier is provided for purifying air in rooms of a home, office, or other commercial establishment. Air is filtered by a mechanical filter, then odors are removed from the air, and the air is exposed to germicidal lamps for killing bacteria, then the air passes through a high efficiency ele ...


2
Arff John H: Air purifier. July 17, 1973: US3745750 (51 worldwide citation)

An air purifier having an electrostatic filter and a charcoal filter for removing airborne impurities. The purifier has blower means for moving air therethrough and also includes air treating means in the form of an ozone generator or ultraviolet lamp. The charcoal filter has longitudinal openings w ...


3
Schmidt Burbach Gerhard, Jung Anton L, Hubert Helmut, Lapczyna Manfred, Ledwon Erhard, Rock Wilfried, Strauss Heinz: Air filter with electrostatic particle collection. Buderus sche Eisenwerke, Ross Karl F, Dubno Herbert, March 26, 1974: US3798879 (43 worldwide citation)

A filter, for purifying air at least in part by electrostatic collection of particulates contained therein, has at least one charged gas-permeable filter surface extending transversely to the gas stream and designed mechanically to retain the particles by interposing a surface in the path of the gas ...


4
Soltis Charles W: Electrostatic air filter. October 9, 1973: US3763633 (34 worldwide citation)

An air cleaner is provided comprising a filter assembly, an electrical power pack, and interconnecting high-voltage transmission means. The filter assembly is constructed of a filter unit having a prefilter and two layers of a dielectric filter media between which is sandwiched a positively charged ...


5
Gilbertson John E: Air purifying and deodorizing device for automobiles. March 27, 1973: US3722182 (31 worldwide citation)

An air purifying and deodorizing device for an automobile comprising a housing positioned on the rear window deck of the automobile and having air intake and air discharge openings. An electronic filtering device is mounted at the air intake opening for removing air-borne particles from the air bein ...


6
Dimitrik Paul: Air purifier. Kintzinger Warren H, October 29, 1974: US3844741 (30 worldwide citation)

An air purifier having an electrostatic precipitator for removing particles from the air, an ultraviolet light for treating the air, and an ozone removing filter positioned downstream from the precipitator. A filter including a metallic screen positioned upstream of the precipitator. The precipitato ...


7
Penney Gaylord W: Electrostatic dust filter. Brown Murray Flick & Peckham, October 7, 1975: US3910779 (28 worldwide citation)

An electrostatic dust filter is provided utilizing a fabric filtering member. The dust particles are electrically charged and are deposited on the filter member in an electric field maintained at the surface of the filter, so that the dust particles deposit in a relatively porous layer having a low ...


8
Anderson William M, Dervay II John R: Electro-bag dust collector. The Air Preheater Company, May 22, 1973: US3733784 (23 worldwide citation)

A filter arrangement that first imposes an electrostatic charge upon all particulate matter carried by a stream of gas to be filtered. A charge of similar polarity is placed upon the filtering means whereby the particulate matter having a like charge is repelled therefrom to permit only the dust-fre ...


9
Reed George A, Mott James A: Electrostatic dust collector. American Precision, Christel & Bean, October 28, 1975: US3915676 (22 worldwide citation)

An apparatus for separating particulate matter from a gas stream wherein dirty gas is moved through an electrostatic precipitator to remove most of the particulate matter and then is moved through a filter of foraminous material while an electric field is applied to the filter whereby the remainder ...


10
Sargent Ray: Anti-pollution apparatus. December 19, 1972: US3706182 (22 worldwide citation)

An anti-pollution device for insulation in factory smoke stacks. This device includes a charcoal filter through which the smoke is pulled by fan blades.The device also includes high voltage electrodes for producing an arc from point to point which is accomplished by a distributor.