Patent US3220248A successfully refreshed from Google Patents.
US3220248A
Expired / Lapsed
US
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Ultrasonic inspection device
Assignee: AMF Inc
•
Filing: 1962-08-20
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Granted: 1965-11-30
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Fenton M Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
G; G01; G01B; G01B17/00; G01B17/02; Y; Y10; Y10S; Y10S73/00; Y10S73/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB665775A
Cited
US2672392A
Cited
GB708413A
Cited
GB779690A
Cited
US2883860A
Cited
US2888824A
Cited
US2921465A
Cited
US3065631A
Cited
US3050988A
Cited
US3029385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |