US3132996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contra-rotating plasma system
Assignee: Individual
•
Filing: 1962-12-10
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Granted: 1964-05-12
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Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 William R Baker
- 👤 Halbach Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/02; H05H1/16; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A MAGNETOHYDRODYNAMIC APPARATUS, THE COMBINATION COMPRISING: (A) AN ANNULAR OUTER ELECTRODE, (B) MEANS PROVIDING A MAGNETIC FIELD WITH SAID OUTER ELECTRODE WHICH FIELD IS SYMMETRIC ABOUT AN AXIS EXTENDING LONGITUDINALLY THROUGH SAID OUTER ELECTRODE AND WHICH FORMS A PLASMA TRAPPING REGION THEREIN, (C) A CENTRAL ELECTRODE DISPOSED WITHIN SAID OUTER ELECTRODE SUBSTANTIALLY AT SAID AXIS AND PROJECTING INTO SAID PLASMA TRAPPING REGION, (D) AN ANNULAR FIELD ELECTRODE DISPOSED WITHIN SAID OUTER ELECTRODE AND ENCIRCLING SAID AXIS IN SPACED APART RELATION TO SAID CENTRAL ELECTRODE AND SAID OUTER ELECTRODE, (E) A HIGH VOLTAGE SOURCE APPLYING A NEGATIVE POTENTIAL TO SAID FIELD ELECTRODE RELATIVE TO THAT OF SAID OUTER ELECTRODE AND SAID CENTRAL ELECTRODE, (F) MEANS FOR ADMITTING GAS TO SAID PLASMA TRAPPING REGION AND, (G) MEANS PROVIDING FOR A SUBSTANTIAL DEGREE OF VACUUM WITHIN SAID PLASMA TRAPPING REGION.
Claim 2
Dependent Claim
138 words
IN A MAGNETOHYDRODYNAMIC APPARATUS, THE COMBINATION COMPRISING: (A) AN ANNULAR OUTER ELECTRODE, (B) MEANS PROVIDING A MAGNETIC FIELD WITH SAID OUTER ELECTRODE WHICH FIELD IS SYMMETRIC ABOUT AN AXIS EXTENDING LONGITUDINALLY THROUGH SAID OUTER ELECTRODE AND WHICH FORMS A PLASMA TRAPPING REGION THEREIN, (C) A CENTRAL ELECTRODE DISPOSED WITHIN SAID OUTER ELECTRODE SUBSTANTIALLY AT SAID AXIS AND PROJECTING INTO SAID PLASMA TRAPPING REGION, (D) AN ANNULAR FIELD ELECTRODE DISPOSED WITHIN SAID OUTER ELECTRODE AND ENCIRCLING SAID AXIS IN SPACED APART RELATION TO SAID CENTRAL ELECTRODE AND SAID OUTER ELECTRODE, (E) A HIGH VOLTAGE SOURCE APPLYING A NEGATIVE POTENTIAL TO SAID FIELD ELECTRODE RELATIVE TO THAT OF SAID OUTER ELECTRODE AND SAID CENTRAL ELECTRODE, (F) MEANS FOR ADMITTING GAS TO SAID PLASMA TRAPPING REGION AND, (G) MEANS PROVIDING FOR A SUBSTANTIAL DEGREE OF VACUUM WITHIN SAID PLASMA TRAPPING REGION.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |