Research-Cottrell, Inc.
44Patents
0Active
44Granted
37Portfolio score
Filing activity: Jan 15, 1976 → Jul 31, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4209306A | Pulsed electrostatic precipitator | Performing Operations; Transporting | 72 | Expired |
| US4883570A | Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves | Electricity | 70 | Expired |
| US4390831A | Electrostatic precipitator control | Emerging Cross-Sectional Technologies | 58 | Expired |
| US4375364A | Rigid discharge electrode for electrical precipitators | Performing Operations; Transporting | 46 | Expired |
| US4189308A | High voltage wetted parallel plate collecting electrode arrangement for an electrostatic precipitator | Performing Operations; Transporting | 40 | Expired |
| US4122646A | Equilateral derrick structure | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4559211A | Method for reduced temperature operation of flue gas collectors | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4040774A | Apparatus for constructing concrete walls | Fixed Constructions | 26 | Expired |
| US4293320A | High energy reverse air dust collector | Performing Operations; Transporting | 24 | Expired |
| US4052491A | Modular gas and liquid contact means | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5165902A | Method and apparatus for reducing nitrogen dioxide emissions in a dry sodium scrubbing process using humidification | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4077785A | Corrosion resistant electrostatic precipitator | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5156658A | Electrostatic precipitator gas inlet plenum having a corrugated perforated plate | Performing Operations; Transporting | 17 | Expired |
| US4311491A | Electrostatic precipitator control for high resistivity particulate | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4525142A | Process for treating flue gas with alkali injection and electron beam | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4372832A | Pollution control by spray dryer and electron beam treatment | Performing Operations; Transporting | 12 | Expired |
| US4395448A | Filling sheet attaching means for gas and liquid contact apparatus and method of assembly of plural parallel filling sheets | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4322392A | SO.sub.2 Scrubbing system for flue gas desulfurization | Chemistry; Metallurgy | 12 | Expired |
| US4406762A | Electron beam coal desulfurization | Chemistry; Metallurgy | 12 | Expired |
| US4255775A | Electrostatic precipitator rapper control system with enhanced accuracy | Electricity | 11 | Expired |
| US5205177A | Method and apparatus for gas monitoring | Physics | 11 | Expired |
| US4285024A | Electrostatic precipitator rapper control system rapper plunger lift indicator | Performing Operations; Transporting | 10 | Expired |
| US4451411A | Support means for transverse fill for cooling towers | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4221573A | Electrostatic precipitator rapping mechanism | Performing Operations; Transporting | 10 | Expired |
| US4351804A | Sulfur dioxide scrubber with hydroclone separator | Performing Operations; Transporting | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.