| Patent | Date |
|---|
Ionization filter for purifying air
Grant 6,375,721 - Holter April 23, 2 | 2002-04-23 |
Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space
Grant 5,066,466 - Holter , et al. * November 19, 1 | 1991-11-19 |
Process, filter and device for making available high-quality breathing air
Grant 5,015,451 - Holter , et al. May 14, 1 | 1991-05-14 |
Circuit arrangement for the evaluation of a signal produced by a semiconductor gas sensor
Grant 4,992,965 - Holter , et al. February 12, 1 | 1991-02-12 |
Method of and apparatus for cooling and cleaning the roof and environs of a coke oven
Grant 4,941,824 - Holter , et al. July 17, 1 | 1990-07-17 |
Method of treating waste
Grant 4,886,000 - Holter , et al. December 12, 1 | 1989-12-12 |
Device for detecting different pollutants in gas streams
Grant 4,875,406 - Holter , et al. October 24, 1 | 1989-10-24 |
Process for wet quenching of coke
Grant 4,802,573 - Holter , et al. February 7, 1 | 1989-02-07 |
Device for the detection of noxious substances in the air supplied to a compartment occupied by people
Grant 4,742,763 - Holter , et al. May 10, 1 | 1988-05-10 |
Process and device for purifying polluted air
Grant 4,733,605 - Holter , et al. March 29, 1 | 1988-03-29 |
Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
Grant 4,670,234 - Holter , et al. June 2, 1 | 1987-06-02 |
Method of cleaning air loaded with pollutants
Grant 4,551,304 - Holter , et al. November 5, 1 | 1985-11-05 |
Apparatus for cleaning air loaded with pollutants
Grant 4,451,435 - Holter , et al. May 29, 1 | 1984-05-29 |
Process for filtering separators in dry chemisorption
Grant 4,432,776 - Holter , et al. February 21, 1 | 1984-02-21 |
Noxious-component removal from flue gas and compositions useful therefor
Grant 4,388,281 - Holter , et al. June 14, 1 | 1983-06-14 |
Method of and apparatus for the chemisorptive scrubbing of waste gases
Grant 4,366,132 - Holter , et al. December 28, 1 | 1982-12-28 |
Respiratory device for catastrophic fires and/or smog weather conditions
Grant 4,297,117 - Holter , et al. October 27, 1 | 1981-10-27 |
Dust aspirating arrangement
Grant 4,289,509 - Holter September 15, 1 | 1981-09-15 |
Compositions containing silicon dioxide
Grant 4,255,195 - Holter , et al. March 10, 1 | 1981-03-10 |
Removal of noxious contaminants from gas
Grant 4,222,993 - Holter , et al. September 16, 1 | 1980-09-16 |
Refuse pyrolysis
Grant 4,206,186 - Holter , et al. June 3, 1 | 1980-06-03 |
Gas purification
Grant 4,201,751 - Holter , et al. May 6, 1 | 1980-05-06 |
Extraction of charge gases from coke ovens
Grant 4,100,033 - Holter July 11, 1 | 1978-07-11 |
Gas purification method and apparatus
Grant 4,061,476 - Holter , et al. December 6, 1 | 1977-12-06 |
Process and arrangement for the removal of impurities from gases
Grant 4,003,722 - Holter January 18, 1 | 1977-01-18 |
Apparatus For Separating Solid Particles From A Fluid Medium
Grant 3,591,011 - Holter , et al. July 6, 1 | 1971-07-06 |
| 