US2668892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact and arc runner structure for circuit interrupting devices
Assignee: Allis Chalmers Corp
•
Filing: 1950-12-30
•
Granted: 1954-02-09
•
Expires: 1970-12-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Kelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:30
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1901573A
Cited
US2227507A
Cited
US2259971A
Cited
US2242905A
Cited
US2276859A
Cited
GB561512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |