US2147791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic material having low hysteresis losses
Assignee: Koninklijke Philips NV
•
Filing: 1934-11-22
•
Granted: 1939-02-21
•
Expires: 1954-11-22
Abstract
No abstract record available.
Inventors
- 👤 Holst Gilles
- 👤 Six Willem
- 👤 Snoek Jacob Louis
- 👤 Burgers Wilhelm Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1233; C21D8/1244; C21D8/1266
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) | 1942-02-20 | 1942-08-22 | 1943-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-20 | 1946-08-22 | 1947-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-20 | 1950-08-22 | 1951-02-21 | $7700.00 | Window Closed / Lapsed |