US Patent No: 6,837,698
Number of patents in Portfolio can not be more than 2000
Multilayer coextrusion die and method
Stats
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Jan 4, 2005
Issued date -
Dec 19, 2001
filing date -
10/028,052
serial no -
In Force
status
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Abstract
The invention is an extrusion device comprising an interleaving block portion. The interleaving block portion includes at least two first chambers, each first chamber including a width, a length, a height, and an input aperture. The length dimension of the first chambers are generally parallel. An output aperture is included in each first chamber, the output aperture is wider and shorter in height than the input aperture. A series of first distances are defined between the input aperture to points along the output aperture. A die portion is included in the extrusion device. The die portion has a laminate chamber having a height dimension. The height dimension of the laminate is disposed generally perpendicular to the length dimension of the first chambers. An output is disposed at one end of the height dimension. The laminate chamber is disposed so as to be in communication with the output apertures of the parallel first chambers.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,094,788 Interfacial surface generator | 143 | 1990 | |
| 5,269,995 Coextrusion of multilayer articles using protective boundary layers and apparatus therefor | 230 | 1992 | |
| 5,316,703 Method of producing a lamellar polymeric body | 185 | 1993 | |
| 5,389,324 Layer thickness gradient control in multilayer polymeric bodies | 208 | 1993 | |
| 2003/0148,095 Polymeric coextruded multilayer articles | 1 | 2001 | |
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| 6,221,483 Reversibly extensible film | 37 | 1998 | |
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| 6,398,535 Layer sequence selecting device | 7 | 2000 | |
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| 5,236,642 Multiple layer sheet materials, and packages, and methods and apparatus for making | 19 | 1989 | |
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| 5,780,067 Adjustable coextrusion feedblock | 8 | 1996 | |
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| 6,203,742 Method for forming multilayer sheets and extrusion die therefor | 6 | 1998 | |
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| 4,426,344 Coextrusion process and apparatus for manufacturing multi-layered flat films of thermoplastic materials | 33 | 1981 | |
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| 4,669,965 Multi-layer extrusion die | 17 | 1984 | |
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| 5,156,857 Extrusion die for extrusion blow molding equipment | 38 | 1991 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 4, 2016 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |