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 Title: |
US4557959:
Multilayer medical working means
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Kuehlein, Georg; Roeslau, Germany
Gerlach, Ernst; Rehau, Germany
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| Assignee: |
Rehau Plastiks AG & Co., Rehau, Germany
other patents from REHAU PLASTIKS AG & CO. (469295) (approx. 8)
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| Published / Filed: |
1985-12-10
/ 1983-02-15
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| Application Number: |
US1983000467191
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| IPC Code: |
Advanced:
A61J 1/00;
A61J 1/05;
A61L 29/04;
A61L 31/04;
A61L 31/10;
A61M 25/00;
A61M 25/16;
IPC-7:
A61M 25/00;
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| ECLA Code: |
A61L31/04H; A61L29/04B; A61L31/10; K61J1/10; K61M25/00G; K61M25/00S1;
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| U.S. Class: |
Current:
428/036.6;
428/036.91;
428/518;
428/520;
428/522;
604/408;
604/410;
Original:
428/036;
604/408;
604/410;
428/035;
428/518;
428/520;
428/522;
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| Field of Search: |
604/408,410
428/035,36,518,520,522
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| Priority Number: |
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| Abstract: |
A multilayer medical working means comprises at least two walls each made of a glass-clear, soft plastic, with one of the two walls being physiologically unobjectionable and the other wall or walls being a physiologically questionable wall provided with at least one physiologically questionable and/or untested additive. A full-area circumferential connection exists between the physiologically unobjectionable wall and the physiologically questionable wall. A softener gradient is provided between the walls of the working means in such a manner that the physiologically unobjectionable wall has a higher softener content than the physiologically questionable wall directly adjacent thereto which contains at least one physiologically questionable and/or untested additive. The position of the additive is kept constant in the adjacent physiologically questionable wall against the gradient pressure of the softener.
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| Attorney, Agent or Firm: |
Spencer & Frank ;
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| Primary / Asst. Examiners: |
Lesmes, George F.; Swisher, Nancy A. B.
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
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What is claimed is:
1. Multilayer medical working means for containing or transporting a physiological material, said medical working means comprising at least two walls laminated together, wherein;
- (a) each said wall is made of a glass-clear, soft plastic;
- (b) one of said two walls is physiologically unobjectionable and the other said wall is a physiologically questionable wall provided with at least one of a physiologically questionable and untested additive, wherein said physiologically unobjectionable wall is arranged to be directly adjacent a physiological material contained or transported by said medical working means;
- (c) said two walls are adjacent one another and are connected together by a full-area circumferential connection; and
- (d) said physiologically unobjectionable wall has a higher content of resin softening material than said physiologically questionable wall, causing a softener gradient to be present between said two walls, the position of said additive in said physiologically questionable wall being kept constant in the said physiologically questionable wall against the pressure of the softener gradient.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 8 U.S. patent(s) that reference this one
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