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Patent US2980849A successfully refreshed from Google Patents.
US2980849A
Expired / Lapsed
US
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Sensing head for weld seam testing apparatus
Assignee: Shell USA Inc
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Filing: 1956-12-24
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Granted: 1961-04-18
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Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Paul L Datt
- 👤 William J Warren
- 👤 Richard B Willoughby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:00
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046; G01N27/9006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2104645A
Cited
US2102452A
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US2437455A
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US2443661A
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US2502626A
Cited
DE881262C
Cited
US2836805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |