Patent US5936578A successfully refreshed from Google Patents.
US3041872A
Expired / Lapsed
US
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Apparatus for ultrasonic testing of materials
Assignee: Individual
•
Filing: 1956-02-17
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Granted: 1962-07-03
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Brown
- 👤 Ave Kelvin
- 👤 Rankin Alexander Bryce Calder
- 👤 Haslett Roy William George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/36; G01N29/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2675698A
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US2736193A
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US2562309A
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US2625659A
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US2494990A
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US2603966A
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US2667780A
Cited
US2770966A
Cited
BE521715A
Cited
GB736464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |