US2720458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-tungsten-aluminum alloy for cathode structure
Assignee: GTE Sylvania Inc
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Filing: 1952-04-29
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Granted: 1955-10-11
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard W Kates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:36
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A CATHODE STRUCTURE CHARACTERIZED BY HIGH HOT STRENGTH AND COMPOSED OF A TERNARY ALLOY CONTAINING 5% TO 30% OF TUNGSTEN, .05% TO 2% ALUMINUM, AND 68% TO 94.5% OF NICKEL.
Claim 2
Dependent Claim
30 words
A CATHODE STRUCTURE CHARACTERIZED BY HIGH HOT STRENGTH AND COMPOSED OF A TERNARY ALLOY CONTAINING 5% TO 30% OF TUNGSTEN, .05% TO 2% ALUMINUM, AND 68% TO 94.5% OF NICKEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |