Patent US2310138A successfully refreshed from Google Patents.
US2310138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switching apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1941-10-23
•
Granted: 1943-02-02
•
Expires: 1961-10-23
Abstract
No abstract record available.
Inventors
- 👤 Charles C Whittaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/16; H02P9/18; H01; H01H; H01H36/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-02-01 | 1946-08-03 | 1947-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-01 | 1950-08-03 | 1951-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-01 | 1954-08-03 | 1955-02-02 | $7700.00 | Window Closed / Lapsed |