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US 6,017,598 C1 (7022nd) |
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| MULTILAYER POLYMER FILM FOR A MULTICHAMBER MEDICAL BAG AND PROCESS FOR FABRICATION THEREOF |
| Thomas Kreischer, Saarbrucken, Germany; Klaus Heilmann, St. Wendel, Germany; Thomas Nicola, Forbach, Germany, and Michael Zimmermann, St. Wendel, Germany, assignors to Fresenius AG, Bad Homburg, Germany |
| Reexamination Request No. 90/008,897, Oct. 23, 2007. |
| Reexamination Certificate for Patent 6,017,598, issued Jan. 25, 2000, Appl. No. 564,134, May 28, 1996. |
| PCT No. PCT/EP95/01152, § 371 Date May 28, 1996, PCT Pub. No. WO95/26177, PCT Pub. Date Oct. 5, 1995 |
| Claims priority, application Germany, Mar. 29, 1994, 4410876 |
| Int. Cl. A61J 1/10; B32B 7/06 (2006.01) |
| AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT: |
| Claims 1-14 are cancelled. |
| New claims 15-28 are added and determined to be patentable. |
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| 15. A method of sealing a multilayer polymer film including two or more layers, which, at a first sealing temperature, forms a peelable bond and, at a second higher sealing temperature, forms a permanent bond, wherein the sealing layer has a matrix phase polymer system, wherein the matrix polymer is a polyethylene homopolymer, a polyethylene copolymer, a polypropylene homopolymer, or a polypropylene copolymer and the phase polymer is a styrene ethylene/butylene styrene triblock polymer with a styrene ethylene/butylene diblock component, and/or a styrene ethylene/propylene styrene triblock polymer, which method comprises forming a seam which can be separated by a force in the range of 5 to 20 N/mm2 by sealing the film at a temperature in the range of from 123° C. to 128° C.
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