Patent US2882507A successfully refreshed from Google Patents.
US2882507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer windings
Assignee: Lindberg Engineering Co
•
Filing: 1957-01-22
•
Granted: 1959-04-14
•
Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 George W Holz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:13
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2847; H01F27/2852
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |