US2573255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for reproducing a direct current
Assignee: ABB Norden Holding AB
•
Filing: 1947-12-24
•
Granted: 1951-10-30
•
Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 Forssell Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:17
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1739579A
Cited
US1968576A
Cited
US2129738A
Cited
US2164383A
Cited
US2337253A
Cited
US2429827A
Cited
GB554525A
Cited
GB573793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |