US1777571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil and method of making the same
Assignee: Individual
•
Filing: 1926-06-04
•
Granted: 1930-10-07
•
Expires: 1946-06-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick S Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-10-06 | 1934-04-07 | 1934-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-10-06 | 1938-04-07 | 1938-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-10-06 | 1942-04-07 | 1942-10-07 | $7700.00 | Window Closed / Lapsed |