US2639345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control device
Assignee: Tung Sol Electric Inc
•
Filing: 1949-05-18
•
Granted: 1953-05-19
•
Expires: 1969-05-18
Abstract
No abstract record available.
Inventors
- 👤 Sitzer Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:52
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/06; H01H61/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1727035A
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US2063311A
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US2075499A
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US2103276A
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GB526940A
Cited
US2326054A
Cited
US2463380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |