US2625592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asymmetrical conductive element
Assignee: Compagnie des Freins et Signaux Westinghouse SA
•
Filing: 1949-10-29
•
Granted: 1953-01-13
•
Expires: 1969-10-29
Abstract
No abstract record available.
Inventors
- 👤 Sueur Rene
- 👤 Welker Heinrich
- 👤 Matare Herbert
- 👤 Bethge Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:04
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H10; H10W; H10W90/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE516394C
Cited
US962262A
Cited
US1708573A
Cited
GB279461A
Cited
US1833332A
Cited
DE555545C
Cited
US2423091A
Cited
US2572801A
Cited
US2438892A
Cited
US2472938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |