US2647973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: PACIFIC ELECTRIC MANUFACTURING CORP
•
Filing: 1949-07-18
•
Granted: 1953-08-04
•
Expires: 1969-07-18
Abstract
No abstract record available.
Inventors
- 👤 Donald M Umphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/72; H01H33/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1849875A
Cited
US2039054A
Cited
US1984035A
Cited
US2292158A
Cited
US2284658A
Cited
US2385008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |