US2677623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing electron emissive material and electrodes
Assignee: Claude Paz et Visseaux SA
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Filing: 1950-10-23
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Granted: 1954-05-04
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Expires: 1970-10-23
Abstract
No abstract record available.
Inventors
- 👤 Delrieu Pierre
- 👤 Claude Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A PROCESS FOR MANUFACTURING AN ACTIVATED HOLLOW ELECTRODE FOR ELECTRIC DISCHARGE DEVICE, SAID ELECTRODE BEING PROVIDED WITH AN INNER COATING OF EMISSIVE MATERIAL, COMPRISING BRINGING BARIUM DIOXIDE INSIDE THE CAVITY OF THE ELECTRODE AND REACTING SAID BARIUM DIOXIDE WITH AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TANTALUM AT A TEMPERATURE ABOVE 525* C. AND LOWER THAN ABOUT 1,300* C., SAID REACTION TAKING PLACE, AT LEAST AT THE END OF ITS DURATION, IN A NON-OXIDIZING ATMOSPHERE AT ABOUT THE AIR PRESSURE.
References Cited (Backward Citations)
US2012237A
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US1467398A
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US1720675A
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US1809229A
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US2084172A
Cited
US2375808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |