US2847328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making thorium oxide cathodes
Assignee: Individual
•
Filing: 1957-03-04
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Granted: 1958-08-12
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 James E Cline
- 👤 John P Jasionis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J23/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
METHOD OF MAKING THORIUM OXIDE CATHODES OF LARGE AREAS FOR HIGH POWER MAGNETRONS COMPRISING MIXING IN POWDERED FORM ABOUT 50 PARTS BY WEIGHT OF THORIUM OXIDE, ABOUT 50 PARTS BY WEIGHT OF MOLYBDENUM, AND ABOUT ONE PART BY WEIGHT OF RUTHENIUM INTO AN ORGANIC SOLVENT TO MAKE A PASTE, PASTING SAID MIXTURE INTO A WIRE MESH CONSISTING OF MOLYBDENUM AND FIRING THE COATED WIRE MESH AT ABOUT 1800*C.
Claim 2
Dependent Claim
68 words
METHOD OF MAKING THORIUM OXIDE CATHODES OF LARGE AREAS FOR HIGH POWER MAGNETRONS COMPRISING MIXING IN POWDERED FORM ABOUT 50 PARTS BY WEIGHT OF THORIUM OXIDE, ABOUT 50 PARTS BY WEIGHT OF MOLYBDENUM, AND ABOUT ONE PART BY WEIGHT OF RUTHENIUM INTO AN ORGANIC SOLVENT TO MAKE A PASTE, PASTING SAID MIXTURE INTO A WIRE MESH CONSISTING OF MOLYBDENUM AND FIRING THE COATED WIRE MESH AT ABOUT 1800*C.
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |