Patent US3238448A successfully refreshed from Google Patents.
US3238448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline flaw detector and marker
Assignee: AMF Inc
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Filing: 1961-06-06
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Granted: 1966-03-01
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Expires: 1981-06-06
Abstract
No abstract record available.
Inventors
- 👤 Fenton M Wood
- 👤 Harold J Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:09
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9013; G01N27/902; G01N27/9093; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN APPARATUS FOR INSPECTING FERROMAGNETIC TUBULAR GOODS, SAID APPARATUS BEING ADAPTED TO BE PROPELLED THROUGH THE INTERIOR OF SAID GOODS, THE COMBINATION OF MAGNETIC MEANS OPERATIVE TO CHARACTERISTICALLY MAGNETIZE PORTIONS OF SAID TUBULAR GOODS, AT LEAST ONE DETECTOR SHOE MOUNTED TO SCAN THE INNER WALL OF SAID GOODS TO DETECT FLAWS IN THOSE PORTIONS BEING SCANNED, AND MEANS CONNECTED TO SAID DETECTOR SHOE AND TO SAID MAGNETIC MEANS TO OPERATE SAID MAGNETIC MEANS TO CHARACTERISTICALLY MAGNETIZE THOSE PORTIONS OF SAID GOODS WHICH CONTAIN FLAWS.
Claim 2
Dependent Claim
84 words
IN APPARATUS FOR INSPECTING FERROMAGNETIC TUBULAR GOODS, SAID APPARATUS BEING ADAPTED TO BE PROPELLED THROUGH THE INTERIOR OF SAID GOODS, THE COMBINATION OF MAGNETIC MEANS OPERATIVE TO CHARACTERISTICALLY MAGNETIZE PORTIONS OF SAID TUBULAR GOODS, AT LEAST ONE DETECTOR SHOE MOUNTED TO SCAN THE INNER WALL OF SAID GOODS TO DETECT FLAWS IN THOSE PORTIONS BEING SCANNED, AND MEANS CONNECTED TO SAID DETECTOR SHOE AND TO SAID MAGNETIC MEANS TO OPERATE SAID MAGNETIC MEANS TO CHARACTERISTICALLY MAGNETIZE THOSE PORTIONS OF SAID GOODS WHICH CONTAIN FLAWS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |