Patent US2683671A successfully refreshed from Google Patents.
US2683671A
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Low primary and secondary electron emission surface
Assignee: Westinghouse Electric Corp
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Filing: 1952-07-17
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Granted: 1954-07-13
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Expires: 1972-07-17
Abstract
No abstract record available.
Inventors
- 👤 John H Findlay
- 👤 Dewey D Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
H; H01; H01J; H01J19/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12104; Y10T428/12111; Y10T428/12139; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/12826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
AN ELECTRONIC ELECTRODE COMPRISING: A METALLIC SUPPORTING ELEMENT, A PLURALITY OF SMALL PARTICLES OF TANTALUM POWDER FASTENED TO SAID ELEMENT, AND A COATING OF GRAPHITE ON THE EXPOSED SURFACES OF SAID PARTICLES.
Claim 2
Dependent Claim
32 words
AN ELECTRONIC ELECTRODE COMPRISING: A METALLIC SUPPORTING ELEMENT, A PLURALITY OF SMALL PARTICLES OF TANTALUM POWDER FASTENED TO SAID ELEMENT, AND A COATING OF GRAPHITE ON THE EXPOSED SURFACES OF SAID PARTICLES.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |