Patent US4457285A successfully refreshed from Google Patents.
Patent US3290219A successfully refreshed from Google Patents.
US3290219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma containment method and apparatus
Assignee: General Electric Co
•
Filing: 1963-09-19
•
Granted: 1966-12-06
•
Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Hurwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
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
125 words
A PLASMA CONTAINMENT APPARATUS COMPRISING A PLASMA DISCHARGE TUBE FOR SUPPORTING AN AXIAL PLASMA DISCHARGE THEREIN FIRST MAGNETIC MEANS FOR PRODUCING A FIRST MAGNETIC FIELD ABOUT SAID PLASMA DISCHARGE IN COMPRESSIVE RELATION TO SAID DISCHARGE, AND SECOND MAGNETIC MEANS FOR PRIDUCING A SECOND MAGNETIC FIELD ABOUT SAID PLASMA DISCHARGE ALSO IN COMPRESSIVE RELATION TO SAID DISCHARGR, SAID SECOND MAGNETIC FIELD BEING OF SHORT DURATION AND HAVING A RAPID RISE AND FALL TIME IN COMPARISON TO SAID FIRST MAGNETIC FIELD, WHEREIN THE MEANS FOR PRODUCING SAID SECOND MAGNETIC FIELD PRODUCES SAID FIELD IN OPPOSITION TO SAID FIRST FIELD TO SUBSTANTIALLY CANCEL SAID FIRST FIELD FOR THE SHORT DURATION OF SAID SECOND FIELD WHEREBY THE NET COMPRESSING FIELD RISES RAPIDLY AT THE CONCLUSION OF SAID SECOND FIELD.
Claim 2
Dependent Claim
125 words
A PLASMA CONTAINMENT APPARATUS COMPRISING A PLASMA DISCHARGE TUBE FOR SUPPORTING AN AXIAL PLASMA DISCHARGE THEREIN FIRST MAGNETIC MEANS FOR PRODUCING A FIRST MAGNETIC FIELD ABOUT SAID PLASMA DISCHARGE IN COMPRESSIVE RELATION TO SAID DISCHARGE, AND SECOND MAGNETIC MEANS FOR PRIDUCING A SECOND MAGNETIC FIELD ABOUT SAID PLASMA DISCHARGE ALSO IN COMPRESSIVE RELATION TO SAID DISCHARGR, SAID SECOND MAGNETIC FIELD BEING OF SHORT DURATION AND HAVING A RAPID RISE AND FALL TIME IN COMPARISON TO SAID FIRST MAGNETIC FIELD, WHEREIN THE MEANS FOR PRODUCING SAID SECOND MAGNETIC FIELD PRODUCES SAID FIELD IN OPPOSITION TO SAID FIRST FIELD TO SUBSTANTIALLY CANCEL SAID FIRST FIELD FOR THE SHORT DURATION OF SAID SECOND FIELD WHEREBY THE NET COMPRESSING FIELD RISES RAPIDLY AT THE CONCLUSION OF SAID SECOND FIELD.
References Cited (Backward Citations)
US3105027A
Cited
US3015618A
Cited
US3006835A
Cited
US3089831A
Cited
US3200268A
Cited
US3116209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |