US3566448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the continuous production of sections of foamed materials,particularly on a polyurethane base
Assignee: Maschinenfabrik Hennecke GmbH
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Filing: 1968-07-16
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Granted: 1971-03-02
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Expires: 1988-07-16
Abstract
Abstract APPARATUS FOR THE CONTINUOUS PRODUCTION OF STRUCTURAL SECTIONS OF FOAMED OR SPONGY MATERIALS WHERE A HOLLOW SPACE IS DEFINED BETWEEN TWO CONVEYER BANDS DISPOSED ONE OVER THE OTHER, WHICH MOVE AT A SPEED CORRESPONDING TO THE REACTION VELOCITY OF THE FOAM MASS AND/OR CORRESPONDING TO THE QUANTITY OF THE MASS, AND WHERE THE HOLLOW SPACE IS FORMED BY SPLIT FORMS THAT ABUT AGAINST ONE ANOTHER.
Inventors
- 👤 Rudolf Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |