US2449867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1940-07-12
•
Granted: 1948-09-21
•
Expires: 1960-07-12
Abstract
No abstract record available.
Inventors
- 👤 James M Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:00
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)
US508652A
Cited
US732851A
Cited
US835493A
Cited
US913320A
Cited
US1116504A
Cited
GB147456A
Cited
US1157960A
Cited
US1201491A
Cited
US1402310A
Cited
US1394087A
Cited
US1650172A
Cited
US1530444A
Cited
FR645130A
Cited
US1969575A
Cited
US1922862A
Cited
US1983068A
Cited
US2078657A
Cited
US2138323A
Cited
US2049328A
Cited
US2069082A
Cited
US2148472A
Cited
US2163558A
Cited
US2275885A
Cited
US2318421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |