US2566115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy for cathode element
Assignee: Superior Tube Co
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Filing: 1950-07-21
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Granted: 1951-08-28
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Expires: 1970-07-21
Abstract
No abstract record available.
Inventors
- 👤 Ardrey M Bounds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:54
CPC Classifications
C; C22; C22C; C22C19/00; H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METALLIC CATHODE ELEMENT OF THE INDIRECTLYHEATED TYPE, BEING OF AN ALLOY COMPRISING NICKEL NOT LESS THAN ABOUT 98%, ALUMINUM WITHIN THE RANGE OF FROM 0.01% TO 0.2% AND THE REMAINDER IMPURITIES WITH NOT SIGNIFICANTLY IN EXCESS OF ABOUT 1% COBALT, 0.2% MANGANESE, 0.25% SILICON, 0.2% COPPER, 0.2% IRON, 0.01% SULPHUR, 0.2% CARBON, 0.15% MAGNESIUM, 0.05% TITANIUM.
Claim 2
Dependent Claim
57 words
A METALLIC CATHODE ELEMENT OF THE INDIRECTLYHEATED TYPE, BEING OF AN ALLOY COMPRISING NICKEL NOT LESS THAN ABOUT 98%, ALUMINUM WITHIN THE RANGE OF FROM 0.01% TO 0.2% AND THE REMAINDER IMPURITIES WITH NOT SIGNIFICANTLY IN EXCESS OF ABOUT 1% COBALT, 0.2% MANGANESE, 0.25% SILICON, 0.2% COPPER, 0.2% IRON, 0.01% SULPHUR, 0.2% CARBON, 0.15% MAGNESIUM, 0.05% TITANIUM.
References Cited (Backward Citations)
US2223862A
Cited
US2478841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |