US3145274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline pig detector
Assignee: F H Maloney Co
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Filing: 1961-03-28
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Granted: 1964-08-18
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Davis A Van Scoy
- 👤 Jr Gadsden M Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:56
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/26; F16L55/48; F16L2101/00; F16L2101/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
APPARATUS FOR DETECTING THE PASSAGE OF A BODY THROUGH A PIPELINE CARRYING FLUID UNDER PRESSURE WHICH COMPRISES A HOUSING HAVING AN OPEN END ADAPTED TO BE ATTACHED TO SAID PIPELINE TO COMMUNICATE SAID OPEN END TO THE FLUID PRESSURE IN SAID PIPELINE, A LONGITUDINALLY SLIDABLE PLUNGER IN SAID HOUSING HAVING A FIRST POSITION IN WHICH ONE END OF SAID PLUNGER EXTENDS OUT SAID OPEN END OF SAID HOUSING AND A SECOND POSITION IN WHICH SAID ONE END IS AT LEAST PARTIALLY RETRACTED, MEANS COMMUNICATING FLUID PRESSURE FROM SAID PIPELINE TO BOTH ENDS OF SAID PLUNGER, AND MEANS ON SAID PLUNGER ADAPTED TO CAUSE ACTUATION OF A SIGNAL GENERATING DEVICE UPON MOVEMENT OF SAID PLUNGER TO SAID SECOND POSITION.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |