US2457488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp socket and resistor
Assignee: H A DOUGLAS Manufacturing Co
•
Filing: 1945-08-11
•
Granted: 1948-12-28
•
Expires: 1965-08-11
Abstract
No abstract record available.
Inventors
- 👤 Charles S Penfold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/945; H01R33/9456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US244331A
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US515970A
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US717468A
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US1188596A
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US1416948A
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US1603271A
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US2089935A
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US2337746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |