Patent US2653992A successfully refreshed from Google Patents.
US2653992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminal construction for electric coil forms
Assignee: Grayhill Inc
•
Filing: 1950-10-19
•
Granted: 1953-09-29
•
Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/027; H01C; H01C1/00; H01C1/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1259609A
Cited
US2067615A
Cited
DE724864C
Cited
US2355611A
Cited
US2416683A
Cited
US2537061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |