Patent US3469182A successfully refreshed from Google Patents.
US3469182A
Expired / Lapsed
US
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Flaw detecting apparatus with mechanical scanning of detection means
Assignee: GKN Group Services Ltd
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Filing: 1967-06-23
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Granted: 1969-09-23
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Expires: 1987-06-23
Abstract
No abstract record available.
Inventors
- 👤 John Ralph Wycherley
- 👤 Michael C Proudman
- 👤 Alan C Clare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077380A
Cited
US3281667A
Cited
US3247453A
Cited
US3271662A
Cited
US3311819A
Cited
US3263809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |