US2914637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and device for prolonging the life of current energized filamentary elements
Assignee: Individual
•
Filing: 1956-01-30
•
Granted: 1959-11-24
•
Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wuerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/544; H01; H01H; H01H1/00; H01H1/50; H01H1/504; H02; H02H; H02H9/00; H02H9/02; H02H9/023; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S323/00; Y10S323/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283492A
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US1806796A
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US1701757A
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US1898174A
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AU119731A
Cited
US1960408A
Cited
GB458020A
Cited
US2185130A
Cited
US2774845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |