Patent US2722378A successfully refreshed from Google Patents.
Patent US1973876A successfully refreshed from Google Patents.
Patent US2300485A successfully refreshed from Google Patents.
Patent US2313306A successfully refreshed from Google Patents.
US2313306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making transformers
Assignee: Line Material Co
•
Filing: 1940-06-13
•
Granted: 1943-03-09
•
Expires: 1960-06-13
Abstract
No abstract record available.
Inventors
- 👤 David E Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:18
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49075; Y10T29/49078
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) | 1946-03-08 | 1946-09-07 | 1947-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-08 | 1950-09-07 | 1951-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-08 | 1954-09-07 | 1955-03-09 | $7700.00 | Window Closed / Lapsed |