Patent US1474152A successfully refreshed from Google Patents.
US1474152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction coil
Assignee: Individual
•
Filing: 1921-01-08
•
Granted: 1923-11-13
•
Expires: 1941-01-08
Abstract
No abstract record available.
Inventors
- 👤 Kent Arthur Atwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:35
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1926-11-12 | 1927-05-14 | 1927-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-12 | 1931-05-14 | 1931-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-12 | 1935-05-14 | 1935-11-13 | $7700.00 | Window Closed / Lapsed |