US2921466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic thickness measuring apparatus
Assignee: Magnaflux Corp
•
Filing: 1957-10-31
•
Granted: 1960-01-19
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry N Nerwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
G; G01; G01B; G01B17/00; G01B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2408078A
Cited
US2441957A
Cited
US2431234A
Cited
US2640106A
Cited
US2687338A
Cited
US2839916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |