PHPK Technologies Inc.
5Patents
0Active
5Granted
26Portfolio score
Filing activity: Jun 25, 1993 → Mar 11, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5355679A | High reliability gas expansion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5697220A | Refrigeration of superconducting magnet systems | Electricity | 6 | Expired |
| US6532750B1 | Method and system for densifying cryogenic propellants | Performing Operations; Transporting | 5 | Expired |
| USRE36332E | Refrigeration of superconducting magnet system | General | 3 | Expired |
| US6968704B2 | Method and system for densifying cryogenic propellants | Performing Operations; Transporting | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.