Patent US597378A successfully refreshed from Google Patents.
Patent US3261735A successfully refreshed from Google Patents.
US3261735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming tubular pipe coupling
Assignee: DS Brown Co Inc
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Filing: 1965-03-12
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Granted: 1966-07-19
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Delmont D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:09
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T156/1075; Y10T156/1079
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A PROCESS FOR MAKING A PIPE COUPLING WHICH COMPRISES EXTRUDING A CELLULAR-ELASTOMER IN THE FORM OF A STRIP HAVING A BOTTOM WALL AND AN UPPER WALL WITH AN UPWARDLY-PROJECTING, LONGITUDINAL RIB EXTENDING ALONG THE MID-PORTION OF SAID STRIP AND WALL PORTIONS ON OPPOSITE SIDES OF SAID RIB EACH SLOPING UPWARDLY AND OUTWARDLY FROM THE BASE OF SAID RIB TO THE RESPECTIVE LONGITUDINAL EDGES OF SAID STRIP, FORMING IN SAID RIB AND A PORTION OF SAID STRIP BELOW SAID BASE OF SAID RIB A LONGITUDINAL, NARROW CAVITY, TRANSVERSELY CUTTING SAID EXTRUDED STRIP INTO PIECES WITH LENGTHS CORRESPONDING TO THE DESIRED CIRCUMFERENCE OF THE PIPE COUPLING, FORMING THE RESPECTIVE PIECES INTO RINGS WITH SAID BOTTOM WALL AS THE OUTER, ANNULAR WALL AND SAID UPPER WALL AS THE INNER, ANNULAR WALL WITH THE OPPOSITE ENDS OF THE RESPECTIVE PIECES IN ABUTMENT, AND CEMENTING THE RESPECTIVE OPPOSITE ENDS OF EACH STRIP TOGETHER TO FORM A HOLLOW, CELLULAR-ELASTOMER COUPLING RING HAVING NORMALLY FRUSTO-CONICAL, INNER WALLS TAPERING FROM AN AXIALLY CENTRAL PORTION OF SAID COUPLING RING TO OPPOSITE ENDS THEREOF, SAID CENTRAL PORTION INCLUDING A CELLULAR-ELASTOMER, ANNULAR RIB PROJECTING INTO THE CENTRAL PORTION OF SAID COUPLING RING, AND SAID CENTRAL PORTION HAVING AN ENCLOSED, ANNULAR CAVITY WITH THE OUTER, RADIAL WALL OF SAID CAVITY LOCATED RADIALLY OUTWARDLY OF
Claim 2
Dependent Claim
212 words
A PROCESS FOR MAKING A PIPE COUPLING WHICH COMPRISES EXTRUDING A CELLULAR-ELASTOMER IN THE FORM OF A STRIP HAVING A BOTTOM WALL AND AN UPPER WALL WITH AN UPWARDLY-PROJECTING, LONGITUDINAL RIB EXTENDING ALONG THE MID-PORTION OF SAID STRIP AND WALL PORTIONS ON OPPOSITE SIDES OF SAID RIB EACH SLOPING UPWARDLY AND OUTWARDLY FROM THE BASE OF SAID RIB TO THE RESPECTIVE LONGITUDINAL EDGES OF SAID STRIP, FORMING IN SAID RIB AND A PORTION OF SAID STRIP BELOW SAID BASE OF SAID RIB A LONGITUDINAL, NARROW CAVITY, TRANSVERSELY CUTTING SAID EXTRUDED STRIP INTO PIECES WITH LENGTHS CORRESPONDING TO THE DESIRED CIRCUMFERENCE OF THE PIPE COUPLING, FORMING THE RESPECTIVE PIECES INTO RINGS WITH SAID BOTTOM WALL AS THE OUTER, ANNULAR WALL AND SAID UPPER WALL AS THE INNER, ANNULAR WALL WITH THE OPPOSITE ENDS OF THE RESPECTIVE PIECES IN ABUTMENT, AND CEMENTING THE RESPECTIVE OPPOSITE ENDS OF EACH STRIP TOGETHER TO FORM A HOLLOW, CELLULAR-ELASTOMER COUPLING RING HAVING NORMALLY FRUSTO-CONICAL, INNER WALLS TAPERING FROM AN AXIALLY CENTRAL PORTION OF SAID COUPLING RING TO OPPOSITE ENDS THEREOF, SAID CENTRAL PORTION INCLUDING A CELLULAR-ELASTOMER, ANNULAR RIB PROJECTING INTO THE CENTRAL PORTION OF SAID COUPLING RING, AND SAID CENTRAL PORTION HAVING AN ENCLOSED, ANNULAR CAVITY WITH THE OUTER, RADIAL WALL OF SAID CAVITY LOCATED RADIALLY OUTWARDLY OF
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |