Patent US2487052A successfully refreshed from Google Patents.
US2487052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic switch
Assignee: Individual
•
Filing: 1945-11-29
•
Granted: 1949-11-08
•
Expires: 1965-11-29
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hastings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:02
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/30; H01H51/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US584352A
Cited
US1628802A
Cited
US684378A
Cited
GB242710A
Cited
US1941407A
Cited
US2050665A
Cited
US2289830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |