US2756382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and device for prolonging the life of current energized filamentary elements
Assignee: Individual
•
Filing: 1953-06-30
•
Granted: 1956-07-24
•
Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wuerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:52
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/546; Y; Y10; Y10S; Y10S323/00; Y10S323/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1492844A
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US2614189A
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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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |