BHA Group, Inc.
🏢 View company profile →66Patents
22Active
66Granted
44Portfolio score
Filing activity: Sep 30, 1985 → Aug 26, 2011 · 21 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5730766A | Non-round unitary filter cartridge | Performing Operations; Transporting | 192 | Expired |
| US5632791A | Unitary filter cartridge | Performing Operations; Transporting | 98 | Expired |
| US5746792A | Dust collector filter element and supporting structure | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5665147A | Collector plate for electrostatic precipitator | Performing Operations; Transporting | 37 | Expired |
| US5068811A | Electrical control system for electrostatic precipitator | Emerging Cross-Sectional Technologies | 36 | Expired |
| US7927540B2 | Method of manufacturing a composite filter media | Textiles; Paper | 35 | Active |
| US6440188B1 | Air filter assembly capable of top and bottom loading | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5885314A | Unitary filter cartridge | Performing Operations; Transporting | 31 | Expired |
| US6203591A | Baghouse, long filter assembly and method of installation | Performing Operations; Transporting | 28 | Expired |
| US6726735B1 | Unitary filter cartridge | Performing Operations; Transporting | 27 | Expired |
| US6358292B1 | Pleated filter element with reusable mounting plate | Emerging Cross-Sectional Technologies | 26 | Expired |
| US8057878B2 | Method to connect baffle and internal structure to the outer-shell of sleeping bag, insulated jacket and tent | Emerging Cross-Sectional Technologies | 26 | Active |
| US5837017A | Apparatus for cleaning baghouse filters | Performing Operations; Transporting | 25 | Expired |
| USRE37163E | Unitary filter cartridge | General | 24 | Expired |
| US8308834B2 | Composite filter media | Textiles; Paper | 21 | Active |
| US6233790A | Outer strap for air filter cartridge | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6611440B1 | Apparatus and method for filtering voltage for an electrostatic precipitator | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6752847B2 | High temperature polymer filtration medium | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4813985A | Tensioning device for bag filters | Performing Operations; Transporting | 15 | Expired |
| US6676722B1 | Air filter assembly capable of top and bottom loading | Emerging Cross-Sectional Technologies | 15 | Expired |
| US8262780B2 | High performance gas turbine inlet filter (HEPA) using membrane media | Performing Operations; Transporting | 14 | Active |
| US6375698B1 | Long filter assembly with connection device | Performing Operations; Transporting | 14 | Expired |
| US6540812B2 | Method and system for improved rapper control | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5173867A | Multiple rapper control for electrostatic precipitator | Performing Operations; Transporting | 14 | Expired |
| US7527674B1 | Apparatus for filtering gas turbine inlet air | Performing Operations; Transporting | 13 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.