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Patent US3258957A successfully refreshed from Google Patents.
US3258957A
Expired / Lapsed
US
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Non-destructive testing of materials
Assignee: CA Parsons and Co Ltd
•
Filing: 1963-01-21
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Granted: 1966-07-05
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Smart Desmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:22
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US764176A
Cited
US1680589A
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US2363181A
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US2494244A
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US2621276A
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US2972882A
Cited
US3016732A
Cited
US3063458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |