US2824979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic fissure detector
Assignee: Welding Service Inc
•
Filing: 1955-12-19
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Granted: 1958-02-25
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Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richard W Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:55
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/26; G01N29/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2334593A
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US2511624A
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US2522924A
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US2671862A
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US2666862A
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US2729785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |