Miner Enterprises, inc.
142Patents
51Active
142Granted
47Portfolio score
Filing activity: Jun 14, 1974 → Feb 4, 2022 · 20 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5280890A | Radial elastomer compression spring | Mechanical Engineering; Lighting; Heating | 117 | Expired |
| US4198037A | Method of making polyester elastomer compression spring and resulting product | Mechanical Engineering; Lighting; Heating | 106 | Expired |
| US5868384A | Composite elastomeric spring | Mechanical Engineering; Lighting; Heating | 88 | Expired |
| US6263803A | Gate assembly for a railroad hopper car | Performing Operations; Transporting | 82 | Expired |
| US4566678A | Polymeric apparatus and method of making the same | Mechanical Engineering; Lighting; Heating | 82 | Expired |
| US6412422B2 | Gate assembly for a railroad hopper car | Performing Operations; Transporting | 81 | Expired |
| US4601244A | Operating system for railroad hopper car gate assembly doors | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5326083A | Compression spring with cone shaped frustums subject to compression set | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US6796448B1 | Railcar draft gear housing | Performing Operations; Transporting | 48 | Expired |
| US5957441A | Hourglass-shaped elastomeric compression spring | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US6019049A | Railroad hopper car door assembly | Performing Operations; Transporting | 39 | Expired |
| US6877623B2 | Elastomeric spring assembly for a railcar and method of making same | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US5845796A | Elastomer spring/hydraulic shock absorber cushioning device | Performing Operations; Transporting | 38 | Expired |
| US5104101A | Buffer cartridge | Performing Operations; Transporting | 36 | Expired |
| US5601031A | Constant contact side bearing | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US4998997A | Side bearing unit for railroad car | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US6279487A | Railroad hopper car door assembly | Performing Operations; Transporting | 32 | Expired |
| US5351844A | Elastomeric spring unit | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4768816A | Means for sealing or locking a cam action door fastener | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6092470A | Railroad car side bearing with thermal insulator | Performing Operations; Transporting | 30 | Expired |
| US5163372A | Unit for actuating gates of a hopper railroad car | Performing Operations; Transporting | 29 | Expired |
| US4712487A | Side bearing unit for railroad car, including method of making | Performing Operations; Transporting | 26 | Expired |
| USD675130S1 | Railcar gate assembly pinion gear | General | 26 | Active |
| US4617868A | Railroad hopper car with self-contained discharge system | Performing Operations; Transporting | 25 | Expired |
| US5829359A | Railway hopper car discharge gate assembly | Performing Operations; Transporting | 22 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.