Patent US3238596A successfully refreshed from Google Patents.
US3238596A
Expired / Lapsed
US
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Method of fabricating a matrix cathode
Assignee: Unisys Corp
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Filing: 1962-10-23
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Granted: 1966-03-08
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Charles E Rich
- 👤 Charles K Trace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:58
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF FORMING AN IMPREGNATED MATRIX CATHODE COMPRISING THE STEPS OF, FORMING A MIXTURE OF NICKEL POWDER AND AN ACTIVATING AGENT CHOSEN FROM HDYRISES OF TITANIUM OR ZIRCONIUM WHEREIN SAID ACTIVATING AGENT RANGES FROM .25 TO 1.5 PERCENT BY WEIGHT OF SAID MIXTURE, SINTERING SAID MIXTURE TO FORM A LOOSELY COMPACTED SINTERED MATRIX, IMPREGNATING SAID MATRIX WITH A MATERIAL WHICH WHEN SUITABLY PROCESSED FREELY EMITS ELECTRONS WHEN HEATED, COMPRESSING SAID IMPREGNATED MATRIX TO MORE TIGHTLY COMPACT SAID MATRIX.
Claim 2
Independent Claim
79 words
THE METHOD OF FORMING AN IMPREGNATED MATRIX CATHODE COMPRISING THE STEPS OF, FORMING A MIXTURE OF NICKEL POWDER AND AN ACTIVATING AGENT CHOSEN FROM HDYRISES OF TITANIUM OR ZIRCONIUM WHEREIN SAID ACTIVATING AGENT RANGES FROM .25 TO 1.5 PERCENT BY WEIGHT OF SAID MIXTURE, SINTERING SAID MIXTURE TO FORM A LOOSELY COMPACTED SINTERED MATRIX, IMPREGNATING SAID MATRIX WITH A MATERIAL WHICH WHEN SUITABLY PROCESSED FREELY EMITS ELECTRONS WHEN HEATED, COMPRESSING SAID IMPREGNATED MATRIX TO MORE TIGHTLY COMPACT SAID MATRIX.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |