US4996482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor stick for NMR probe
Assignee: Jeol Ltd
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Filing: 1989-09-20
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Granted: 1991-02-26
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Expires: 2009-09-20
Abstract
Abstract A capacitor stick having a base electrode on whose tip is installed a chip capacitor is disclosed. The chip capacitor is insulated from the base electrode. A compensating coil is inserted between the base electrode and chip capacitor, and a series resonant circuit regarding a decoupling high frequency is composed of the chip capacitor and compensating coil.
Inventors
- 👤 Teruaki Fujito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:44
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/36; G01R33/3628; G01R33/34; G01R33/34092
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
In a sample coil arrangement for a nuclear magnetic resonance device wi&.h a capacitor stick arranged adjacent the sample and constituting part of the tuning circuit for the observation frequency, the improvement comprising: (a) said capacitor stick having a chip capacitor spaced from a base electrode by an insulating means, and (b) a compensating coil connecting the base electrode and the chip capacitor, said chip capacitor and compensating coil forming a series resonant circuit such that the resonant frequency corresponds to an NMR decoupling high frequency.
Claim 2
Dependent Claim
86 words
In a sample coil arrangement for a nuclear magnetic resonance device wi&.h a capacitor stick arranged adjacent the sample and constituting part of the tuning circuit for the observation frequency, the improvement comprising: (a) said capacitor stick having a chip capacitor spaced from a base electrode by an insulating means, and (b) a compensating coil connecting the base electrode and the chip capacitor, said chip capacitor and compensating coil forming a series resonant circuit such that the resonant frequency corresponds to an NMR decoupling high frequency.
Claim 3
Dependent Claim
87 words
A capacitor stick for use in a tuning circuit installed in an NMR probe, comprising: a stick member; a lower base electrode attached to the end of the stick element; an upper base electrode spaced from the lower base electrode by an insulating rod; a chip capacitor attached to the upper base electrode; and a compensating coil which connects the upper base electrode and the lower base electrode, said compensating coil forming a series resonant circuit regarding the decoupling high frequency in combination with the chip capacitor.
Claim 4
Dependent Claim
87 words
A capacitor stick for use in a tuning circuit installed in an NMR probe, comprising: a stick member; a lower base electrode attached to the end of the stick element; an upper base electrode spaced from the lower base electrode by an insulating rod; a chip capacitor attached to the upper base electrode; and a compensating coil which connects the upper base electrode and the lower base electrode, said compensating coil forming a series resonant circuit regarding the decoupling high frequency in combination with the chip capacitor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |