ACF Industries Incorporated
401Patents
0Active
401Granted
41Portfolio score
Filing activity: Oct 4, 1961 → Sep 12, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4608931A | Filament wound railway hopper car | Performing Operations; Transporting | 114 | Expired |
| US4068821A | Valve seat ring having a corner groove to receive an elastic seal ring | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US3933100A | Hopper gate actuating mechanism | Performing Operations; Transporting | 83 | Expired |
| US4215749A | Gate valve for shearing workover lines to permit shutting in of a well | Emerging Cross-Sectional Technologies | 65 | Expired |
| US4213480A | Manual override for hydraulic gate valve actuators | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4242966A | Railway car truck transom including a tubular bearing assembly | Performing Operations; Transporting | 51 | Expired |
| US4039115A | Apparatus for obtaining abutting contact of hollow tank courses to be circumferentially welded | Performing Operations; Transporting | 50 | Expired |
| US4477055A | Valve seat for ball valves | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4265182A | Damping railway car truck | Performing Operations; Transporting | 43 | Expired |
| US4262688A | Metal seat assemblies for valves | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4163544A | Two piece composite valve seal ring construction | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US4111393A | Ball valve seat assembly having a removably mounted face seal insert | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4121495A | Car key hole bolt fastening assembly | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4124194A | Metallic seat construction for valves | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US4364542A | Packing gland assembly | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4135546A | Stem packing assembly for gate valves and means for removal | Emerging Cross-Sectional Technologies | 32 | Expired |
| US3993284A | Connection of actuator cylinder housing to valve bonnet | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4262691A | Cam means for ball valve seat rings | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4406303A | Gate valve with position indicator | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4504047A | Scissor support for welding tank sections | Performing Operations; Transporting | 31 | Expired |
| US3960168A | Valve locking device | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4293116A | Metallic seat assembly for valves | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US4677917A | High volume covered hopper car with loading from below and automatic unloading | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4108080A | Railway car truck and side bearing assembly | Performing Operations; Transporting | 28 | Expired |
| US4162782A | Seal assembly for butterfly valve | Mechanical Engineering; Lighting; Heating | 27 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.