US4435680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave resonator structure
Assignee: Medical College of Wisconsin
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Filing: 1982-03-25
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Granted: 1984-03-06
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Expires: 2002-03-25
Abstract
Abstract A microwave resonator is formed by a cylindrical loop and one or more gaps which extend along its length. The loop is formed from a machineable insulating material and a layer of electrically conductive material is deposited over its surfaces.
Inventors
- 👤 Wojciech Froncisz
- 👤 James S. Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A lumped circuit resonator for a gyromagnetic resonance spectrometer which resonates when high frequency electromagnetic energy is applied thereto, and which comprises: a loop formed from an electrically insulating base material which is disposed around a central longitudinal axis, said loop having a gap formed along its entire length which is dimensioned to provide a desired resonant frequency, an electrically conductive layer deposited on the surface of the loop, including the surfaces formed by said gap to shield the base material from the applied high frequency electromagnetic energy, and in which a dielectric rod having a very low thermal coefficient of expansion is inserted in the gap to maintain the dimensions of the gap relatively constant.
Claim 2
Dependent Claim
116 words
A lumped circuit resonator for a gyromagnetic resonance spectrometer which resonates when high frequency electromagnetic energy is applied thereto, and which comprises: a loop formed from an electrically insulating base material which is disposed around a central longitudinal axis, said loop having a gap formed along its entire length which is dimensioned to provide a desired resonant frequency, an electrically conductive layer deposited on the surface of the loop, including the surfaces formed by said gap to shield the base material from the applied high frequency electromagnetic energy, and in which a dielectric rod having a very low thermal coefficient of expansion is inserted in the gap to maintain the dimensions of the gap relatively constant.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |