PATENT CLAIM ANALYSIS

Application Number: 15780932
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["250", "287000"]

Abstract:
Four main rod electrodes included in a main electrode section are disposed in a rotationally symmetric manner around an ion optical axis. Among four pre-rod electrodes included in a pre-electrode section disposed in front of the main electrode section, two are in contact with a circle of a radius r 0 , whereas the other two are disposed to be in contact with a circle of a radius R 0  larger than r 0 , resulting in rotational asymmetry around the ion optical axis. Accordingly, a shape of acceptance on an x-y plane regarding positions of ions in the pre-electrode section becomes elliptical. This allows the shape of the acceptance to become gradually flat as the ions travel along the ion optical axis, reducing a mismatch between emittance of incoming ions and the acceptance on a receiving side, and relieving ion loss during ion introduction.

Claim (Index 2):
A quadrupole mass filter comprising:\n a) a main electrode section including four main rod electrodes disposed to surround a central axis; b) a pre-electrode section including pre-rod electrodes shorter than the main rod electrodes, the pre-rod electrodes being disposed in front of each of the main rod electrodes of the main electrode section along the central axis; c) a first voltage application unit configured to apply, to each of the main rod electrodes, a voltage obtained by adding a direct current voltage and a radio-frequency voltage according to a mass-to-charge ratio of ions that are allowed to pass; and d) a second voltage application unit configured to apply, to each of the pre-rod electrodes, a radio-frequency voltage identical to the radio-frequency voltage in frequency, wherein in the pre-electrode section, first two of the pre-rod electrodes positioned so as to sandwich the central axis and second two of the pre-rod electrodes adjacent to the first two of the pre-rod electrodes around the central axis have different sectional shapes of curved surfaces facing the central axis.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 97.0
- Lexical Diversity: 2.01316
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12594450', '13639474', '12920306', '14898804', '14045979']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.744199771563649
- 35 USC 102 Novelty (BERT): 0.5139036975589975
- Combined Prediction Score: 0.7211701641631839
- Mean Citation Score: 302.2430280000001
- Max Citation Score: 329.41928
- Similarity Product: 272.0904800173712

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test