Patent US2540600A successfully refreshed from Google Patents.
US2540600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for generating or influencing an alternating current
Assignee: ABB Norden Holding AB
•
Filing: 1946-12-28
•
Granted: 1951-02-06
•
Expires: 1966-12-28
Abstract
No abstract record available.
Inventors
- 👤 Stalhane Bertil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:56
CPC Classifications
H; H03; H03B; H03B7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1887599A
Cited
US2040677A
Cited
US2294908A
Cited
US2407288A
Cited
US2360932A
Cited
US2406804A
Cited
US2410076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |