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Patent US2881386A successfully refreshed from Google Patents.
US2881386A
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Pipe inspection method and apparatus
Assignee: Tuboscope Co
•
Filing: 1956-02-28
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Granted: 1959-04-07
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Price Berry Glenn
- 👤 Fenton M Wood
- 👤 Julian H Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093; E; E21; E21B; E21B17/00; E21B17/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1933547A
Cited
US2135675A
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US2435985A
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US2540870A
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US2677802A
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US2719953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |