US3265495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cathodes
Assignee: Thales SA
•
Filing: 1962-01-26
•
Granted: 1966-08-09
•
Expires: 1982-01-26
Abstract
No abstract record available.
Inventors
- 👤 Freytag Jean-Pierre
- 👤 Arvind M Shorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:59
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF MANUFACTURING IMPREGNATED-TYPE CATHODES HAVING A BODY OF POROUS METAL, COMPRISING THE STEPS OF DEPOSITING REFRACTORY METAL POWDER SUBSTANTIALLY IN THE ABSECNE OF COMPRESSION ON A SUPPORT, PRE-SINTERING THE THUS DEPOSITED REFRACTORY METAL POWDER AT RELATIVELY LOW TEMPERATURE IN THE RANGE OF BETWEEN 1200*C. AND 1600*C., MACHINING SAID PRE-SINTERED POWDER TO FORM THE DESIRED SHAPE OF SAID BODY, RE-SINTERING THE BODY AT A RELATIVELY HIGH TEMPERATUURE IN THE RANGE OF BETWEEN 1700* C. AND 2400*C., AND IMPREGNATING THE BODY WITH AN ALKALINE-EARTH SALT UNDER PREDETERMINED AMBIENT CONDITIONS OPERATIVE FOR SUCH IMPREGNATION.
Claim 2
Independent Claim
93 words
A METHOD OF MANUFACTURING IMPREGNATED-TYPE CATHODES HAVING A BODY OF POROUS METAL, COMPRISING THE STEPS OF DEPOSITING REFRACTORY METAL POWDER SUBSTANTIALLY IN THE ABSECNE OF COMPRESSION ON A SUPPORT, PRE-SINTERING THE THUS DEPOSITED REFRACTORY METAL POWDER AT RELATIVELY LOW TEMPERATURE IN THE RANGE OF BETWEEN 1200*C. AND 1600*C., MACHINING SAID PRE-SINTERED POWDER TO FORM THE DESIRED SHAPE OF SAID BODY, RE-SINTERING THE BODY AT A RELATIVELY HIGH TEMPERATUURE IN THE RANGE OF BETWEEN 1700* C. AND 2400*C., AND IMPREGNATING THE BODY WITH AN ALKALINE-EARTH SALT UNDER PREDETERMINED AMBIENT CONDITIONS OPERATIVE FOR SUCH IMPREGNATION.
References Cited (Backward Citations)
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US2117636A
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US2544112A
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US2663069A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |