US2693979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic device
Assignee: Individual
•
Filing: 1950-08-03
•
Granted: 1954-11-09
•
Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 George L Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/28; B03C1/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US512381A
Cited
DE336282C
Cited
US1487811A
Cited
US2179625A
Cited
US2285440A
Cited
US2417762A
Cited
US2517325A
Cited
US2529440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |