US3015791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated cores for transformers and reactors
Assignee: Siemens Schuckertwerke AG
•
Filing: 1952-04-11
•
Granted: 1962-01-02
•
Expires: 1972-04-11
Abstract
No abstract record available.
Inventors
- 👤 Rolf Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:49
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US640314A
Cited
AT108862B
Cited
US2393038A
Cited
US2407688A
Cited
CH291922A
Cited
US2628273A
Cited
US2797396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |