Patent US2768231A successfully refreshed from Google Patents.
US2768231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-in construction
Assignee: Essex Wire Corp
•
Filing: 1951-03-30
•
Granted: 1956-10-23
•
Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Donald O Schwennesen
- 👤 Helgason Arni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:06
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/10; H01G2/103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US63505A
Cited
US1541756A
Cited
US1788261A
Cited
GB336362A
Cited
US2417552A
Cited
US2451516A
Cited
US2586892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |