Patent US3585678A successfully refreshed from Google Patents.
US3585678A
Expired / Lapsed
US
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Apparatus for manufacturing longitudinally split foam insulating tubes
Assignee: Individual
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Filing: 1967-11-20
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Granted: 1971-06-22
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Expires: 1987-11-20
Abstract
Abstract A METHOD AND APPARATUS FOR PRODUCING FOAM INSULATING TUBES HAVING A LONGITUDINAL SLIT WHERE THERE IS PROVIDED A FIXED INNER MOLD CORE AND A MOVING OUTER MOLD. A FOIL MEMBER SURROUNDS THE INNER CORE AND A SECOND FOIL MEMBER IS ALIGNED WITH THE INSIDE OF THE OUTER MOLD. THE FOAM MATERIAL IS THEN CONTINUOUSLY FOAMED IN PLACE AS THE FOIL MEMBERS AND THE OUTER MOLDS ADVANCE. A FOAM INSULATING TUBE HAVING A LONGITUDINAL SLIT, A FOIL OUTER COVERING, A FOIL INNER SURFACE AND A FOIL COVERING ON THE SURFACES OF SAID SLIT.
Inventors
- 👤 Peter Neumann
- 👤 Horst Roland Strobl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:56
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29C; B29C33/00; B29C33/34; B29C33/36; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/324
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |