US2957231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for electric discharge device
Assignee: General Electric Co
•
Filing: 1958-08-01
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Granted: 1960-10-25
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Expires: 1978-08-01
Abstract
No abstract record available.
Inventors
- 👤 Paul B Davis
- 👤 Clifford F O'neill
- 👤 Stanley L Slomski
- 👤 Dimitrios M Speros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0735; H01J61/0737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SINTERED CATHODE PELLET FOR AN ELECTRIC DISCHARGE TUBE CONSISTING ESSENTIALLY OF A HIGHLY POROUS TUNGSTEN SPONGE HAVING DENSITY IN THE RANGE OF 8.5 TO 10 AND FORMED OF 8.5 TO 9.5 PARTS BY WEIGHT OF COARSE TUNGSTEN POWDER HAVING A PARTICLE SIZE IN THE RANGE OF ABOUT 3 TO 8 MICRONS AND ONE PART BY WEIGHT OF AN EMISSIVE MATERIAL CORRESPONDING ESSENTIALLY TO THE FORMULA (XBAO AL2O3) YBA WHEREIN X IS BETWEEN 0.1 AND 1 AND Y IS BETWEEN 0.5X AND 2.6X.
Claim 2
Dependent Claim
83 words
A SINTERED CATHODE PELLET FOR AN ELECTRIC DISCHARGE TUBE CONSISTING ESSENTIALLY OF A HIGHLY POROUS TUNGSTEN SPONGE HAVING DENSITY IN THE RANGE OF 8.5 TO 10 AND FORMED OF 8.5 TO 9.5 PARTS BY WEIGHT OF COARSE TUNGSTEN POWDER HAVING A PARTICLE SIZE IN THE RANGE OF ABOUT 3 TO 8 MICRONS AND ONE PART BY WEIGHT OF AN EMISSIVE MATERIAL CORRESPONDING ESSENTIALLY TO THE FORMULA (XBAO AL2O3) YBA WHEREIN X IS BETWEEN 0.1 AND 1 AND Y IS BETWEEN 0.5X AND 2.6X.
References Cited (Backward Citations)
US2700118A
Cited
US2769708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |