US3594249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nonplane building components composed of thermoplastic and metal layers
Assignee: BASF SE
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Filing: 1968-09-11
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Granted: 1971-07-20
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Expires: 1988-09-11
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF NONPLANE BUILDING COMPONENTS WHICH COMPRISE A RELATIVELY THICK INNER PLY OF THE THERMOPLASTIC AND RELATIVELY THIN OUTER PLIES OF METAL. THE BUILDING COMPONENTS ARE PREPARED BY CONTINUOUSLY PREPARING A BOARD FROM A POLYETHYLENE BY MEANS OF A SCREW EXTRUDER AT ELEVATED TEMPERATURE, COVERING THE BOARD THUS OBTAINED ON BOTH SIDES FIRST WITH A FILM OF A SPECIAL TERPOLYMER AND THEN WITH A METAL SHEET AT ELEVATED TEMPERATURE, FORMING A SANDWICH ASSEMBLY FROM THE WHOLE UNDER THE PRESSURE OF ROLLERS AND THEN BRINGING THE PLANE BOARD INTO THE DESIRED NONPLANE SHAPE AT ELEVATED TEMPERATURE USING EXTERNAL FORCES.
Inventors
- 👤 Heinz Mueller-Tamm
- 👤 Hans Frielingsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:07
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/322; B; B29; B29C; B29C67/00; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B38/00; B32B38/18; B32B38/1866; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; E04C2/02; E04C2/26; E04C2/284; E04C2/292; B32B37/00; B32B37/14; B32B37/15; B32B37/153; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1016; Y10T156/1018; Y10T156/1043; Y10T156/1044
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) | 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 |