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Patent US2438191A successfully refreshed from Google Patents.
US2438191A
Expired / Lapsed
US
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High-pressure modulator tube
Assignee: Westinghouse Electric Corp
•
Filing: 1943-06-19
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Granted: 1948-03-23
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Expires: 1963-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles M Slack
- 👤 Clarence E Dawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:04
CPC Classifications
H; H01; H01T; H01T2/00; H01T2/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1182290A
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US1559714A
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US1784869A
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US1877607A
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US1789626A
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US1987645A
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US2034756A
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US2206710A
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US2276861A
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US2288861A
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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) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |