US2817494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode support
Assignee: SUPERIOR RAILWAY PRODUCTS CORP
•
Filing: 1955-05-17
•
Granted: 1957-12-24
•
Expires: 1975-05-17
Abstract
No abstract record available.
Inventors
- 👤 William A Pennington
- 👤 Charles E Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/107
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2733018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |