US3015781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the protection of electrical apparatus against excess voltage
Assignee: Individual
•
Filing: 1957-12-26
•
Granted: 1962-01-02
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Eklov David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:14
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/44; H02; H02H; H02H9/00; H02H9/04; H03; H03F; H03F1/00; H03F1/52; H04M; H04M1/00; H04M1/738; H04M1/74; H04M1/745
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2079485A
Cited
US2884545A
Cited
US2789254A
Cited
US2841719A
Cited
US2888622A
Cited
US2840726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |