Patent US3056920A successfully refreshed from Google Patents.
US3056920A
Expired / Lapsed
US
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Systems for inspecting material
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-07-15
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Granted: 1962-10-02
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Expires: 1979-07-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Herrald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093; E; E21; E21B; E21B23/00; E21B23/04; E21B23/0412; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B34/00; E21B34/06; E21B47/00; E21B47/006; E21B47/01; E21B47/02; E21B47/024; E21B47/09; E21B47/092; E21B47/12; E21B47/14; E21B49/00; G01N27/9006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2467306A
Cited
US2602833A
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US2661009A
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US2700703A
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US2786179A
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US2892151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |