US3594250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of plane building components comprising a thermoplastic innerlayer with metal outer plies
Assignee: BASF SE
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Filing: 1968-09-06
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Granted: 1971-07-20
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Expires: 1988-09-06
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF PLANE BUILDING COMPONENTS WHICH ARE COMPOSED OF A RELATIVELY THICK INNER PLY OF A THERMOPLASTIC AND RELATIVELY THIN OUTER PLIES OF METAL. IN THE PROCESS A BOARD IS FIRST MADE CONTINUOUSLY FROM A POLYETHYLENE BY MEANS OF A SCREW EXTRUDER AT ELEVATED TEMPERATURE THEN THIS BOARD IS COATED ON BOTH SIDES BY MEANS OF A PAIR OF ROLLERS CONTINUOUSLY WITH A FILM OF A SPECIAL TERPOLYMER AND THEREAFTER WITH A SHEET OF METAL. THE WHOLE IS MADE INTO A SANDWICH ASSEMBLY BY THE PRESSURE OF THE ROLLERS AND THEN BROUGHT TO AMBIENT TEMPERATURE.
Inventors
- 👤 Heinz Mueller-Tamm
- 👤 Dieter Mahling
- 👤 Hans Frielingsdorf
- 👤 Alfred Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B15/00; B32B15/04; B32B15/08
Claims Analysis
Total Claims: 0
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |