US2438191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure modulator tube
Assignee: Westinghouse Electric Corp
•
Filing: 1943-06-19
•
Granted: 1948-03-23
•
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 00:31
CPC Classifications
H; H01; H01T; H01T2/00; H01T2/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1035958A
Cited
US1182290A
Cited
US1559714A
Cited
US1784869A
Cited
US1877607A
Cited
US1789626A
Cited
US1987645A
Cited
US2034756A
Cited
US2206710A
Cited
US2276861A
Cited
US2288861A
Cited
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 |