Patent US3230145A successfully refreshed from Google Patents.
US3230145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for magnetically confining a plasma
Assignee: Individual
•
Filing: 1963-11-04
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Granted: 1966-01-18
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Harold P Furth
- 👤 Marshall N Rosenbluth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:35
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/02; H05H1/10; H05H1/12; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
APPARATUS FOR MAGNETICALLY CONFINING A PLASMA COMPRISING COIL MEANS WOUND IN THE FORM OF AN ANNULAR TUBE FOR ESTABLISHING IN AN EVACUATED SPACE A MAGNETIC FIELD EXTENDING LONGITUDINALLY THROUGH SAID TUBE IN AN ANNULAR CONFIGURATION, EACH OF THE FLUX SURFACES OF SAID MAGNETIC FIELD BEING CLOSED AND DEFINING THE LOCUS OF INFINITESIMAL INCREMENTAL FLUX TUBES OF CONSTANT VOLUME PER CONSTANT FLUX, THE LOCUS OF THE CENTROIDS OF TRANSVERSE SECTIONS OF SAID FLUX SURFACES BEING A CLOSED CURVE, THE AREA OF SAID TRANSVERSE SECTIONS VARYING PERIODICALLY ALONG SAID CENTROID LOCUS TO INCLUDE AT LEAST SEVERAL PERIODS OF ALTERNATE AREA MAXIMA AND MINIMA, THE DISTANCE BETWEEN SUCCESSIVE AREA MINIMA BEING ONE-HALF PERIOD, SAID AREA MINIMA BEING OF SLENDER ELLIPTICAL TRANSVERSE SECTIONS, THE MAJOR AXES OF SAID SLENDER ELLIPTICAL SECTIONS BEING AT LEAST FOUR TIMES GREATER THAN THE MINOR AXES, THE MAJOR AXIS OF EACH AREA MINIMUM BEING ANGULARLY DISPLACED 90 DEGREES WITH RESPECT TO THAT OF THE PRECED-
Claim 2
Dependent Claim
156 words
APPARATUS FOR MAGNETICALLY CONFINING A PLASMA COMPRISING COIL MEANS WOUND IN THE FORM OF AN ANNULAR TUBE FOR ESTABLISHING IN AN EVACUATED SPACE A MAGNETIC FIELD EXTENDING LONGITUDINALLY THROUGH SAID TUBE IN AN ANNULAR CONFIGURATION, EACH OF THE FLUX SURFACES OF SAID MAGNETIC FIELD BEING CLOSED AND DEFINING THE LOCUS OF INFINITESIMAL INCREMENTAL FLUX TUBES OF CONSTANT VOLUME PER CONSTANT FLUX, THE LOCUS OF THE CENTROIDS OF TRANSVERSE SECTIONS OF SAID FLUX SURFACES BEING A CLOSED CURVE, THE AREA OF SAID TRANSVERSE SECTIONS VARYING PERIODICALLY ALONG SAID CENTROID LOCUS TO INCLUDE AT LEAST SEVERAL PERIODS OF ALTERNATE AREA MAXIMA AND MINIMA, THE DISTANCE BETWEEN SUCCESSIVE AREA MINIMA BEING ONE-HALF PERIOD, SAID AREA MINIMA BEING OF SLENDER ELLIPTICAL TRANSVERSE SECTIONS, THE MAJOR AXES OF SAID SLENDER ELLIPTICAL SECTIONS BEING AT LEAST FOUR TIMES GREATER THAN THE MINOR AXES, THE MAJOR AXIS OF EACH AREA MINIMUM BEING ANGULARLY DISPLACED 90 DEGREES WITH RESPECT TO THAT OF THE PRECED-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |