US2461202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic testing device
Assignee: AT&T Inc
•
Filing: 1945-03-28
•
Granted: 1949-02-08
•
Expires: 1965-03-28
Abstract
No abstract record available.
Inventors
- 👤 Walter B Ellwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:08
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US541719A
Cited
US1292279A
Cited
US1335647A
Cited
US1666309A
Cited
US2010813A
Cited
US2318666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |