US2978636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flaw detecting apparatus
Assignee: VIKING INSTR Inc
•
Filing: 1957-04-30
•
Granted: 1961-04-04
•
Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Fountain Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/20; G01N27/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1824745A
Cited
US2220489A
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US2506454A
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US2765405A
Cited
GB681779A
Cited
US2701336A
Cited
GB741164A
Cited
US2752589A
Cited
US2916697A
Cited
US2873425A
Cited
US2942248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |