Patent US3201975A successfully refreshed from Google Patents.
US3201975A
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Method for locating pipe joints
Assignee: C W FUELLING Inc
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Filing: 1960-04-25
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Granted: 1965-08-24
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert W Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:15
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/005; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF LOCATING A JOINT IN AN UNDERGROUND PIPE WHICH COMPRISES THE STEPS OF PRODUCING IN THE ATMOSPHERE WITHIN SAID PIPE A SOUND SIGNAL BY EXPELLING A PRESSURIZED FLUID ONTO THE INNER SURFACE OF SAID PIPE, SAID SOUND SIGNAL BEING AUDIBLE AT A REMOTE POINT AND DIRECTING SAID PRESSURIZED FLUID PROGRESSIVELY FROM POINT TO POINT ALONG THE INSIDE OF SAID PIPE UNTIL A VARIATION OCCURS IN THE SAID SOUND SIGNAL.
Claim 2
Independent Claim
71 words
THE METHOD OF LOCATING A JOINT IN AN UNDERGROUND PIPE WHICH COMPRISES THE STEPS OF PRODUCING IN THE ATMOSPHERE WITHIN SAID PIPE A SOUND SIGNAL BY EXPELLING A PRESSURIZED FLUID ONTO THE INNER SURFACE OF SAID PIPE, SAID SOUND SIGNAL BEING AUDIBLE AT A REMOTE POINT AND DIRECTING SAID PRESSURIZED FLUID PROGRESSIVELY FROM POINT TO POINT ALONG THE INSIDE OF SAID PIPE UNTIL A VARIATION OCCURS IN THE SAID SOUND SIGNAL.
References Cited (Backward Citations)
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Cited
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US2894539A
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US2940302A
Cited
US3016733A
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US2977994A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |