US2894203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple frequency eddy current testing apparatus
Assignee: Individual
•
Filing: 1957-04-11
•
Granted: 1959-07-07
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Robert W Cory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1954996A
Cited
US2005011A
Cited
US2337231A
Cited
US2483471A
Cited
US2489920A
Cited
US2495627A
Cited
US2806992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |