Patent US3579722A successfully refreshed from Google Patents.
US3579722A
Expired / Lapsed
US
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Apparatus for continuous production of foam plastic sections
Assignee: Bayer AG
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Filing: 1968-05-22
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Granted: 1971-05-25
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Expires: 1988-05-22
Abstract
Abstract THE CONTINUOUS PRODUCTION OF FOAM PLASTIC SECTIONS IS ACCOMPLISHED IN AN APPARATUS COMPRISING A DOUBLE CONVEYOR BELT ASSEMBLY CONFINED AT THE SIDES BY LATERAL SIDE BOUNDARY MEMBERS WHEREIN THE INLET APERTURE BETWEEN THE UPPER AND LOWER CONVEYOR BELTS AND THE LATERAL SIDE BOUNDARIES IS CLOSED BY A SEALING MEMBER WHICH HAS AT LEAST ONE SUPPLY NOZZLE POSITIONED THEREIN.
Inventors
- 👤 Wolfgang Schmidt
- 👤 Karl-Josef Kraft
- 👤 Willi Kurth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:46
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/52; 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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |