Patent US2257486A successfully refreshed from Google Patents.
Patent US2489595A successfully refreshed from Google Patents.
US2489595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide core tuning device
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-04-23
•
Granted: 1949-11-29
•
Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 Spoor Theodorus Antonius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:04
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
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) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |