Active Spectrum, Inc.
9Patents
9Active
9Granted
45Portfolio score
Filing activity: Oct 31, 2006 → Jun 25, 2012 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7868616B2 | Method of and apparatus for in-situ measurement of changes in fluid composition by electron spin resonance (ESR) spectrometry | Electricity | 16 | Active |
| US7589529B1 | Method of and apparatus for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry | Electricity | 15 | Active |
| US9103261B1 | Device and method for adjusting dosage of fuel additive based on in-situ measurement of additive and containment concentration | Physics | 15 | Active |
| US8212563B2 | Method and apparatus for in-situ measurement of soot by electron spin resonance (ESR) spectrometry | Physics | 14 | Active |
| US8125224B2 | Method of and apparatus for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry | Electricity | 14 | Active |
| US8829904B2 | Method of and apparatus for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry | Electricity | 8 | Active |
| US8648596B2 | Method of and apparatus for analysis of the composition of a sample by electron spin resonance (ESR) spectrometry employing carrier suppression | Physics | 5 | Active |
| US9287599B1 | Miniature tunable filter | Electricity | 3 | Active |
| US9546970B2 | Method of and apparatus for in-situ measurement of soot by electron spin resonance (ESR) spectrometry | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.