Didier Engineering GmbH
106Patents
0Active
106Granted
41Portfolio score
Filing activity: Jul 16, 1974 → Aug 3, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4289585A | Method and apparatus for the wet quenching of coke | Chemistry; Metallurgy | 91 | Expired |
| US4222824A | Recuperative coke oven and process for the operation thereof | Chemistry; Metallurgy | 81 | Expired |
| US4224109A | Process and apparatus for the recovery of waste heat from a coke oven operation | Emerging Cross-Sectional Technologies | 77 | Expired |
| US4284478A | Apparatus for quenching hot coke | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4382139A | Process and apparatus for continuous production of polyesters | Performing Operations; Transporting | 35 | Expired |
| US4421481A | Furnace for heating slabs, billets, rough castings and the like | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US4895821A | Process for the manufacture of catalytic elements and catalytic elements so produced | Performing Operations; Transporting | 29 | Expired |
| US4950473A | Method for reducing nitrogen oxides in flue gas | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4280033A | Process and apparatus for the thermal treatment of coal | Chemistry; Metallurgy | 17 | Expired |
| US4284476A | Process and apparatus for utilization of the sensible heat of hot coke for drying and preheating coking coal | Chemistry; Metallurgy | 16 | Expired |
| US4935392A | Process for the manufacture of catalyst members for the reduction of oxides of nitrogen and catalyst members produced thereby | Performing Operations; Transporting | 15 | Expired |
| US4282066A | Process and apparatus for coking coal using microwave radiation | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4202407A | Apparatus for cooling gases from coke plants | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4259312A | Process and apparatus for catalytically reacting a reducing gas and water vapor | Chemistry; Metallurgy | 14 | Expired |
| US4308102A | Process and apparatus for drying and preheating coking coal by means of flue gas | Chemistry; Metallurgy | 13 | Expired |
| US4447333A | Process for the elimination of ammonia in coke plant waste waters | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4087250A | Apparatus for removing nitric oxides from processing exhaust gases | Performing Operations; Transporting | 10 | Expired |
| US4264415A | Apparatus for the dry cooling of coke | Chemistry; Metallurgy | 9 | Expired |
| US5128021A | Pitch from coal tar pitch, method of its production, as well as application of such pitch material | Chemistry; Metallurgy | 9 | Expired |
| US4186056A | Device for closing the filling opening of a coke oven chamber | Chemistry; Metallurgy | 8 | Expired |
| US4352680A | Process and/or facility for driving off dissolved, corrosive gaseous constituents from watery solutions | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4468288A | Method of preheating coal and supplying preheated coal to a coke oven | Chemistry; Metallurgy | 8 | Expired |
| US4258006A | Apparatus for fluid catalytic conversion of gases | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4284479A | Sealing arrangement for the oven chamber door on a coking oven | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4049777A | Method of waste gas treatment | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.