US3660548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for continuously producing foamed panels having uniform properties
Assignee: Toyo Tire Corp
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Filing: 1969-06-11
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Granted: 1972-05-02
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Expires: 1989-06-11
Abstract
Abstract A METHOD FOR CONTINUOUSLY PRODUCING FOAMED PLASTIC PANELS HAVING UNIFORM PROPERTIES BY FEEDING A PAIR OF SHEETS OF FLEXIBLE FACING MATERIALS CONTINUOUSLY DOWNWARDLY INTO A SPACE BETWEEN TWO DOWNWARDLY RUNNING CONVEYING MEANS THROUGH THE UPPER END OF THE SPACE, JOINING THE SIDE EDGES OF THE TWO SHEETS OF FACING MATERIAL TO FORM A TUBULAR CONTAINER, AND RUNNING THE CONVEYING MEANS TO CONVEY THE FOAMING LIQUID MATERIAL AND THE FACING MATERIAL DOWNWARDLY, WHEREBY PANNELS HAVING FLEXBLE SHEET MATERIAL ON BOTH SURFACES AND A FOAM CORE ARE PRODUCED FROM THE LOWEST END OF THE CONVEYING MEANS. D R A W I N G
Inventors
- 👤 Hiroshi Komada
- 👤 Kuniyasu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:09
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/203; B29C44/26; B29L; B29L2007/00; B29L2009/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/249991; Y10T428/249992
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |