Patent US3148056A successfully refreshed from Google Patents.
US3148056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode
Assignee: Westinghouse Electric Corp
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Filing: 1962-08-10
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Granted: 1964-09-08
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Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Brodie Ivor
- 👤 Gene R Feaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:47
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF PRODUCING A THERMIONIC CATHODE FOR THE EMISSION OF ELECTRONS COMPRISING THE STEPS OF PROVIDING A QUANTITY OF ELECTRON ACTIVE MATERIAL POWDER, COATING SAID POWDER WITH AN EVAPORABLE RESIN MATERIAL, ADMIXING SAID COATED POWDER WITH A QUANTITY OF POWDER COMPRISED SUBSTANTIALLY OF NICKEL TO PROVIDE A MIXTURE THEREOF, FORM-
Claim 2
Independent Claim
51 words
A METHOD OF PRODUCING A THERMIONIC CATHODE FOR THE EMISSION OF ELECTRONS COMPRISING THE STEPS OF PROVIDING A QUANTITY OF ELECTRON ACTIVE MATERIAL POWDER, COATING SAID POWDER WITH AN EVAPORABLE RESIN MATERIAL, ADMIXING SAID COATED POWDER WITH A QUANTITY OF POWDER COMPRISED SUBSTANTIALLY OF NICKEL TO PROVIDE A MIXTURE THEREOF, FORM-
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |