US2476590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode coating
Assignee: Westinghouse Electric Corp
•
Filing: 1943-07-03
•
Granted: 1949-07-19
•
Expires: 1963-07-03
Abstract
No abstract record available.
Inventors
- 👤 George S Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1961122A
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US1813320A
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US1905035A
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US1909916A
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US2065570A
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US2015424A
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US2081864A
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US2075377A
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US2172207A
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US2198327A
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US2256341A
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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) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |