US3453871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detecting flaws in materials
Assignee: Individual
•
Filing: 1966-08-02
•
Granted: 1969-07-08
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Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 Josef Krautkramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
G; G01; G01B; G01B17/00; G01N; G01N29/00; G01N29/04; G01N29/11; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02854; G01N2291/0289
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1297213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |