Patent US3228712A successfully refreshed from Google Patents.
US3228712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint and band therefor
Assignee: American Pipe and Construction Co
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Filing: 1962-03-19
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Granted: 1966-01-11
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Delbert A Hausmann
- 👤 Arthur G Lander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:07
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0027; F16L13/00; F16L13/10; F16L13/11; F16L13/113; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PIPE JOINT CONSTRUCTION, COMPRISING A PAIR OF CONCRETE PIPE SECTIONS DISPOSED IN END-TO-END RELATION AND HAVING INTERFITTING TUBULAR METAL END PORTIONS DISPOSED RADIALLY INWARD OF THEIR PERIPHERIES, THE ADJACENT CONCRETE END PORTIONS OF SAID SECTIONS RADIALLY OUTWARD OF THE INTERFITTING SECTIONS DEFINING A CIRCUMFERENTIAL GROOVE, A BODY OF CONCRETE MORTAR FILLING SAID GROOVE AND EXTENDING RADIALLY BEYOND THE GROOVE AND OVERLYING THE ADJACENT PERIPHERAL PORTIONS OF THE PIPES, AND AN OUTER MOISTUREIMPERVIOUS BAND BRIDGING SAID GROOVE AND RECEIVING AND COVERING SAID MORTAR, SAID BAND BEING FORMED OF AN IMPERVIOUS, FLEXIBLE, CLOSED CELL, FOAM PLASTIC-LIKE SUBSTANCE HAVING A BROKEN CELL STRUCTURE ON ITS INNER SURFACE, SAID CELLS RECEIVING SAID MORTAR WHEREBY THE BAND IS MECHANICALLY BONDED THERETO.
Claim 2
Dependent Claim
117 words
A PIPE JOINT CONSTRUCTION, COMPRISING A PAIR OF CONCRETE PIPE SECTIONS DISPOSED IN END-TO-END RELATION AND HAVING INTERFITTING TUBULAR METAL END PORTIONS DISPOSED RADIALLY INWARD OF THEIR PERIPHERIES, THE ADJACENT CONCRETE END PORTIONS OF SAID SECTIONS RADIALLY OUTWARD OF THE INTERFITTING SECTIONS DEFINING A CIRCUMFERENTIAL GROOVE, A BODY OF CONCRETE MORTAR FILLING SAID GROOVE AND EXTENDING RADIALLY BEYOND THE GROOVE AND OVERLYING THE ADJACENT PERIPHERAL PORTIONS OF THE PIPES, AND AN OUTER MOISTUREIMPERVIOUS BAND BRIDGING SAID GROOVE AND RECEIVING AND COVERING SAID MORTAR, SAID BAND BEING FORMED OF AN IMPERVIOUS, FLEXIBLE, CLOSED CELL, FOAM PLASTIC-LIKE SUBSTANCE HAVING A BROKEN CELL STRUCTURE ON ITS INNER SURFACE, SAID CELLS RECEIVING SAID MORTAR WHEREBY THE BAND IS MECHANICALLY BONDED THERETO.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |