US3534590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic testing apparatus and method
Assignee: Imperial Metal Industries Kynoch Ltd
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Filing: 1967-09-20
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Granted: 1970-10-20
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Expires: 1987-09-20
Abstract
No abstract record available.
Inventors
- 👤 Donald Arthur Kent
- 👤 Peter Lester Crowcroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0609; G01N29/0618
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |