US2809666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge arresters
Assignee: Emco Wheaton Corp
•
Filing: 1955-01-03
•
Granted: 1957-10-15
•
Expires: 1975-01-03
Abstract
No abstract record available.
Inventors
- 👤 Judd William Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053; F16L55/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US611823A
Cited
US1536531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |