1
Heinz Holter, Heinz Gresch, Heinrich Igelbuscher: Gas purification method and apparatus. Heinz Holter, Berman Aisenberg & Platt, December 6, 1977: US04061476 (39 worldwide citation)

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. Apparatus is provided for the process.


2
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert: Apparatus for cleaning air loaded with pollutants. Heinz Holter, Karl F Ross Herbert Dubno, May 29, 1984: US04451435 (36 worldwide citation)

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 generate ozone which is reacted with the sulfu ...


3
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert: Apparatus for the protection of air fed to a labor-protection or vehicle compartment. Heinz Holter, Karl F Ross, Herbert Dubno, July 23, 1985: US04530817 (32 worldwide citation)

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 to the cabin.


4
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert: Method of cleaning air loaded with pollutants. Heinz Holter, Karl F Ross, Herbert Dubno, November 5, 1985: US04551304 (29 worldwide citation)

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 generate ozone which is reacted with the sulfu ...


5
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert: Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants. Heinz Holter, Karl F Ross, Herbert Dubno, June 2, 1987: US04670234 (29 worldwide citation)

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 nitrogen and the sulphur oxides as well as o ...


6
Heinz Holter, Heinz Gresch, Heinrich Igelbuscher: Process for the purification of gas generated in the pressure gasification of coal. Heinz Holter, Berman Aisenberg & Platt, October 31, 1978: US04123502 (26 worldwide citation)

A process for the purification of gas, which is generated in pressure gasification of coal, which uses a wash oil, especially tar oil, as the washing liquid to avoid clogging of the washing apparatus by tars and tar compounds which precipitate out of the washing liquid when water or aqueous solution ...


7
Heinz Holter, Heinz Gresch, Heinrich Igelbuscher: Process for the purification of flue and other waste gas. Heinz Holter, Berman Aisenberg & Platt, March 21, 1978: US04080428 (22 worldwide citation)

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 calcium oxide, hydroxide or carbonate, the c ...


8
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch: Method of and apparatus for cooling and cleaning the roof and environs of a coke oven. Heinz Holter, Herbert Dubno, July 17, 1990: US04941824 (21 worldwide citation)

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. The collected gases are supplied to the dry and ...


9
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert: Process and device for purifying polluted air. Heinz Holter, Karl F Ross, Herbert Dubno, Ronald Lianides, March 29, 1988: US04733605 (20 worldwide citation)

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 the air heated by the heater and disposed dow ...


10
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert, Hanns Rump: Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space. Heinz Holter, Herbert Dubno, November 19, 1991: US05066466 (18 worldwide citation)

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 of semiconductor gas sensors that are used, ...