Patent US2040957A successfully refreshed from Google Patents.
Patent US135744A successfully refreshed from Google Patents.
Patent US2828467A successfully refreshed from Google Patents.
US2828467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and devices for determining the magnetic properties of specimens of magnetic material
Assignee: General Electric Co
•
Filing: 1952-03-26
•
Granted: 1958-03-25
•
Expires: 1972-03-26
Abstract
No abstract record available.
Inventors
- 👤 Lynn H Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:09
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1440470A
Cited
US2133725A
Cited
US2036856A
Cited
US2124578A
Cited
US1985277A
Cited
US2186826A
Cited
US2213983A
Cited
US2351201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |