US3222568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of plasma
Assignee: OI Glass Inc
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Filing: 1963-09-18
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Granted: 1965-12-07
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 Keith C Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:55
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PLASMA GENERATOR WHEREIN A PLASMA JET IS FORMED AND MAINTAINED BETWEEN A CATHODE AND A ANODE BY THE APPLICATION OF ELECTRIC POWER TO THE CATHODE AND ANODE, A CONTROL DEVICE COMPRISING A PAIR OF OPPOSITELY DISPOSED ELECTRODES ADAPTED TO BE PLACED IN A RELATIVELY COOL PORTION OF THE PLASMA JET, MEANS FOR MEASURING VARIATIONS IN CONDUCTRIVITY ACROSS SAID ELECTRODES WHEN THE ELECTRODES ARE IN POSITION, AND MEANS FOR CONTROLLING THE CURRENT FLOW BETWEEN THE CATHODE AND ANODE OF THE PLASMA GENERATOR IN RESPONSE TO VARIATIONS IN CONDUCTIVITY BETWEEN THE ELECTRODES TO MAINTAIN THE CURRENT BETWEEN THE ELECTRODES SUBSTANTIALLY CONTANT AND, IN TURM, THE IONIZATION LEVEL AND HEAT CONTENT OF THE PLASMA JET CONSTANT.
Claim 2
Dependent Claim
115 words
IN A PLASMA GENERATOR WHEREIN A PLASMA JET IS FORMED AND MAINTAINED BETWEEN A CATHODE AND A ANODE BY THE APPLICATION OF ELECTRIC POWER TO THE CATHODE AND ANODE, A CONTROL DEVICE COMPRISING A PAIR OF OPPOSITELY DISPOSED ELECTRODES ADAPTED TO BE PLACED IN A RELATIVELY COOL PORTION OF THE PLASMA JET, MEANS FOR MEASURING VARIATIONS IN CONDUCTRIVITY ACROSS SAID ELECTRODES WHEN THE ELECTRODES ARE IN POSITION, AND MEANS FOR CONTROLLING THE CURRENT FLOW BETWEEN THE CATHODE AND ANODE OF THE PLASMA GENERATOR IN RESPONSE TO VARIATIONS IN CONDUCTIVITY BETWEEN THE ELECTRODES TO MAINTAIN THE CURRENT BETWEEN THE ELECTRODES SUBSTANTIALLY CONTANT AND, IN TURM, THE IONIZATION LEVEL AND HEAT CONTENT OF THE PLASMA JET CONSTANT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |