| no longer | 4 | temporal |
| through the application date | 3 | temporal |
| for more that 20 years | 2 | temporal |
| patent → be → active | 27 |
| patent → be → extant | 3 |
| negative | neutral | positive |
| 0.179 | 0.720 | 0.101 |
| Raw frequency | 30 |
| Normalized frequency | 0.333 |
| Modifier score | 0.700 |
| Perplexity | 294.729 |