PATENT CLAIM ANALYSIS

Application Number: 16070088
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["250", "287000"]

Abstract:
A multipole ion guide ( 30 ) including a plurality of rod electrodes arranged at an angle to the central axis (C) is placed within a collision cell ( 13 ) located in the previous stage of an orthogonal accelerator ( 16 ). Radio-frequency voltages with opposite phases are applied to the rod electrodes of the ion guide ( 30 ) so that any two rod electrodes neighboring each other in the circumferential direction have opposite phases of the voltage. A depth gradient of the pseudopotential is thereby formed from the entrance end toward the exit end within the space surrounded by the rod electrodes, and ions are accelerated by this gradient. During an ion-accumulating process, a direct voltage having the same polarity as the ions is applied to the exit lens electrode ( 132 ) to form a potential barrier for accumulating ions. Among the ions repelled by the potential barrier, ions having smaller m/z return closer to the entrance end. Therefore, when the potential barrier is removed and ions are discharged, ions having smaller m/z are discharged at later points in time than those having larger m/z. Therefore, a wide m/z range of ions can be simultaneously accelerated and ejected by an orthogonal accelerator ( 16 ).

Claim (Index 1):
An orthogonal acceleration time-of-flight mass spectrometer including an orthogonal accelerator for accelerating and ejecting ions in a direction orthogonal to an axis of incidence of ions originating from a sample and a separating-detecting section for separating and detecting the ejected ions according to their times of flight which depend on mass-to-charge ratios of the ions, the orthogonal acceleration time-of-flight mass spectrometer comprising:\n a) an ion-accumulating section located in a previous stage of the orthogonal accelerator, for accumulating target ions to be subjected to a measurement, the ion-accumulating section including:\n a1) an ion guide including a plurality of rod electrodes arranged in such a manner as to surround a central axis, for converging ions within a space surrounded by the rod electrodes by an effect of a radio-frequency electric field, and for accelerating the ions in a direction along the central axis by a gradient of the magnitude or depth of a pseudopotential created along the central axis by the radio-frequency electric field; \n a2) an exit electrode having an opening through which ions can pass, the exit electrode located at an exit end of the direction in which ions are accelerated in the ion guide; and \n a3) a voltage generator for applying a predetermined high radio-frequency voltage to each of the plurality of rod electrodes forming the ion guide so as to create a radio-frequency electric field which accelerates ions in a direction along the central axis of the ion guide while converging the ions within the space surrounded by the rod electrodes, without causing a direct-current potential gradient along the central axis, and for applying a direct voltage having a same polarity as the target ions to the exit electrode to form a potential barrier and subsequently changing the direct voltage to remove the potential barrier; and \n b) an acceleration voltage generator for applying, to the orthogonal accelerator, a pulsed voltage for ion ejection at a point in time where a predetermined length of time elapses from a point in time where the voltage applied from the voltage generator to the exit electrode is changed to remove the potential barrier.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 95.0
- Lexical Diversity: 2.03636
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15512156', '14952012', '14898804', '12440324', '13159974']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7223053481441027
- 35 USC 102 Novelty (BERT): 0.5377856455423613
- Combined Prediction Score: 0.7038533778839287
- Mean Citation Score: 347.274468
- Max Citation Score: 376.17108
- Similarity Product: 348.38486819435127

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test