Patent US1982913A successfully refreshed from Google Patents.
Patent US2777086A successfully refreshed from Google Patents.
US2777086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode
Assignee: Westinghouse Electric Corp
•
Filing: 1952-07-26
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Granted: 1957-01-08
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Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:15
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107945A
Cited
US2175345A
Cited
US2121599A
Cited
US2449967A
Cited
US2492142A
Cited
US2543728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |