Patent US2453148A successfully refreshed from Google Patents.
US2453148A
Expired / Lapsed
US
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Shield box and tuning mechanism for electron tubes
Assignee: Individual
•
Filing: 1943-07-29
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Granted: 1948-11-09
•
Expires: 1963-07-29
Abstract
No abstract record available.
Inventors
- 👤 Fred H Mccall
- 👤 Devreotes Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:47
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1382914A
Cited
US1737824A
Cited
GB324889A
Cited
US1895902A
Cited
US1928408A
Cited
US2130243A
Cited
US2166685A
Cited
US2215200A
Cited
US2298075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |