Patent US2730783A successfully refreshed from Google Patents.
US2730783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming concrete pipes and other hollow bodies
Assignee: Lock Joint Pipe Co
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Filing: 1950-10-12
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Granted: 1956-01-17
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Expires: 1970-10-12
Abstract
No abstract record available.
Inventors
- 👤 Hugh F Kennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/56; B28B21/60; B28B21/02; B28B21/10; B28B21/18; B28B21/20; B28B21/205; B28B21/62; B28B21/76; B28B21/78; B28B21/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A MOULDING APPARATUS, THE COMBINATION COMPRISING A DEFORMABLE OUTER MOULD WALL, A DEFORMABLE INNER MOULD WALL, SAID INNER AND OUTER MOULD WALL DEFINING A MOULD CAVITY THEREBETWEEN, EACH OF SAID MOULDS WALLS BEING FORMED BY INDIVIDUAL SEGMENTS ARRANGED CIRCUMFERENTIALLY OF THE MOULD AND HAVING LONGITUDINAL EDGES OF ADJACENT SEGMENTS OF THE RESPECTIVE WALLS IN SEALED RELATIONSHIP WITH EACH OTHER AND PROVIDING A CIRCUMFERENTIALLY CONTINUOUS MOULD WALL IRRESPECTIVE OF THE ADJUSTED DISTANCE BETWEEN SAID WALLS, MEANS FOR HOLDING SAID MOULD WALLS FOR FORMING A MOULD CAVITY OF A PREDETERMINED VOLUME THEREBETWEEN, AND MEANS FOR MOVING ALL OF SAID SEGMENTS FOR CHANGING THE DISTANCE BETWEEN SAID MOULD WALLS.
Claim 2
Dependent Claim
107 words
IN A MOULDING APPARATUS, THE COMBINATION COMPRISING A DEFORMABLE OUTER MOULD WALL, A DEFORMABLE INNER MOULD WALL, SAID INNER AND OUTER MOULD WALL DEFINING A MOULD CAVITY THEREBETWEEN, EACH OF SAID MOULDS WALLS BEING FORMED BY INDIVIDUAL SEGMENTS ARRANGED CIRCUMFERENTIALLY OF THE MOULD AND HAVING LONGITUDINAL EDGES OF ADJACENT SEGMENTS OF THE RESPECTIVE WALLS IN SEALED RELATIONSHIP WITH EACH OTHER AND PROVIDING A CIRCUMFERENTIALLY CONTINUOUS MOULD WALL IRRESPECTIVE OF THE ADJUSTED DISTANCE BETWEEN SAID WALLS, MEANS FOR HOLDING SAID MOULD WALLS FOR FORMING A MOULD CAVITY OF A PREDETERMINED VOLUME THEREBETWEEN, AND MEANS FOR MOVING ALL OF SAID SEGMENTS FOR CHANGING THE DISTANCE BETWEEN SAID MOULD WALLS.
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |