US2468554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for magnetic field investigation
Assignee: General Electric Co
•
Filing: 1943-03-19
•
Granted: 1949-04-26
•
Expires: 1963-03-19
Abstract
No abstract record available.
Inventors
- 👤 Albert W Hull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:25
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01R33/045; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR681671A
Cited
US1988521A
Cited
US2025580A
Cited
US2027393A
Cited
US2016977A
Cited
US2124825A
Cited
US2047609A
Cited
US2114283A
Cited
US2164383A
Cited
US2053154A
Cited
US2248101A
Cited
US2103507A
Cited
US2414430A
Cited
US2252059A
Cited
US2213357A
Cited
US2246259A
Cited
US2249744A
Cited
US2246516A
Cited
US2401168A
Cited
US2406870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |