US2523148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase balance protective relay system
Assignee: Westinghouse Electric Corp
•
Filing: 1945-05-07
•
Granted: 1950-09-19
•
Expires: 1965-05-07
Abstract
No abstract record available.
Inventors
- 👤 Schaelchlin Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:27
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/32; H02H3/34; H02H3/353
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1461551A
Cited
US1526027A
Cited
US1637043A
Cited
US1980395A
Cited
US2241127A
Cited
US2265039A
Cited
US2343423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |