Patent US2943957A successfully refreshed from Google Patents.
US2943957A
Expired / Lapsed
US
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Method for the spraying of electron emitting thermionic cathodes
Assignee: General Electric Co
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Filing: 1958-10-21
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Granted: 1960-07-05
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Expires: 1978-10-21
Abstract
No abstract record available.
Inventors
- 👤 Grattidge Walter
- 👤 Muller Fredrik Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:34
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF COATING A CATHODE BASE WITH AN ELECTRON EMISSIVE MATERIAL COMPRISING THE FORMATION OF SMALL DROPLETS OF A HYDROXIDE SOLUTION OF ALKALINE EARTH ELEMENTS, PROPELLING SAID DROPLETS TOWARDS THE CATHODE BASE TO BE COATED, DIRECTING A FLOW OF CARBON DIOXIDE TOWARD SAID DROPLETS FOR PRODUCING AN INTERMIXTURE THEREBETWEEN DURING TRANSIT, THE REACTION OF THE HYDROXIDE CONTAINED IN SAID DROPLETS WITH CARBON DIOXIDE FORMING A CARBONATE OF THE ALKALINE EARTH METAL PRIOR TO CONTACT WITH THE CATHODE BASE TO BE COATED, EVAPORATING THE LIQUID IN SAID DROPLETS, AND DEPOSITION OF SAID CARBONATE ON THE CATHODE BASE.
Claim 2
Independent Claim
97 words
THE METHOD OF COATING A CATHODE BASE WITH AN ELECTRON EMISSIVE MATERIAL COMPRISING THE FORMATION OF SMALL DROPLETS OF A HYDROXIDE SOLUTION OF ALKALINE EARTH ELEMENTS, PROPELLING SAID DROPLETS TOWARDS THE CATHODE BASE TO BE COATED, DIRECTING A FLOW OF CARBON DIOXIDE TOWARD SAID DROPLETS FOR PRODUCING AN INTERMIXTURE THEREBETWEEN DURING TRANSIT, THE REACTION OF THE HYDROXIDE CONTAINED IN SAID DROPLETS WITH CARBON DIOXIDE FORMING A CARBONATE OF THE ALKALINE EARTH METAL PRIOR TO CONTACT WITH THE CATHODE BASE TO BE COATED, EVAPORATING THE LIQUID IN SAID DROPLETS, AND DEPOSITION OF SAID CARBONATE ON THE CATHODE BASE.
References Cited (Backward Citations)
US2355186A
Cited
US2214476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |