US2590523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter contact pressure increasing device
Assignee: Westinghouse Electric Corp
•
Filing: 1947-10-11
•
Granted: 1952-03-25
•
Expires: 1967-10-11
Abstract
No abstract record available.
Inventors
- 👤 Andrew W Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US532537A
Cited
US1395348A
Cited
US727713A
Cited
US816112A
Cited
US949997A
Cited
US1395327A
Cited
US1709947A
Cited
US1664104A
Cited
AT133806B
Cited
US2069082A
Cited
US2311714A
Cited
US2402722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |