Patents Assigned to Dr. E. Fresenius Chemisch Pharmazeutische Industrie
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Patent number: 4413627Abstract: A polarographic catheter-shaped probe for determining analytical data of logical fluids of human beings, of animals, or of plants, and having a cathode, an anode and an electrolyte connecting the two, which are surrounded by a flexible sheath sealed in the tip region of the cathode by an ion-impermeable but gas-permeable membrane, wherein the anode is arranged at the distal end of the catheter shaft away from the cathode tip, the electrolyte extends from the anode to the tip of the cathode within the probe, and the anode and cathode are connected to a terminal jack for measuring instruments located at the end of the probe facing the anode. The jack optionally contains a supply chamber for the electrolyte, which is connected in a liquid-tight manner to the one end of the catheter shaft.Type: GrantFiled: October 3, 1980Date of Patent: November 8, 1983Assignee: Dr. E. Fresenius Chemisch-pharmazeutische Industrie KG Apparatebau KGInventor: Johannes G. Schindler
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Patent number: 4236987Abstract: There is provided a novel type of ion selective membrane comprising a non-ion selective carrier, and an ion selective active phase molecule having a hydrophilic segment and a lipophilic periphery. In the preferred embodiment said molecule is a siloxane molecule whose Si-O-Groups are open chain, branch chain or cyclically oriented. These ion selective membranes are useful in the selective detection of alkali- and alkaline-earth metals. There is further provided an electrode for use with such a membrane.Type: GrantFiled: November 13, 1978Date of Patent: December 2, 1980Assignee: Dr. E. Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KGInventors: Johannes G. Schindler, Wilfried Schael
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Patent number: 4235231Abstract: A portable artificial kidney designed for continuous use includes a catheter with filter properties. The body portion of the catheter has an infusion duct which opens into the surface of the catheter and is provided with surface channels which are covered by a semi-permeable membrane. Ducts are provided which communicate with the channels. One duct is operatively coupled to a suction pump to remove the filtrate. Another duct serves to supply a rinsing solution and the infusion duct serves to replace the liquid which has been filtered off.Type: GrantFiled: July 28, 1978Date of Patent: November 25, 1980Assignee: Dr. E. Fresenius Chemisch Pharmazeutische Industrie KGInventors: Johannes G. Schindler, Wilfried Schael
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Patent number: 4216068Abstract: An ion sensitive electrode comprises a small disc of ion selective polymer or contact with a measuring liquid, the ion selective polymer disc being in contact with a wire of low drift potential relative to the ion selective polymer disc. The invention also includes an electro mechanical measuring arrangement in which the ion sensitive electrode may be used and also a reference electrode suitable for use therewith.Type: GrantFiled: June 6, 1977Date of Patent: August 5, 1980Assignee: Dr. E. Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KGInventors: Johannes G. Schindler, Werner Riemann
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Patent number: 4197852Abstract: The electrical sensor of the present invention for electrochemical analysis comprises a sheath and at one end thereof a semi-permeable membrane which is impermeable for macromolecular materials and bacteria, and further is comprising a measuring probe insertible to said sheath.The sheath is constructed in the form of a pericatheter and the measuring probe comprises a completely self-contained sensor, capable of operating independently of the said sheath, the membrane of said sensor being in direct contact with the membrane of said pericatheter.Type: GrantFiled: June 5, 1978Date of Patent: April 15, 1980Assignee: Dr. E. Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KGInventors: Johannes G. Schindler, Wilfried Schal
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Patent number: 4184935Abstract: An ion sensitive electrode comprises a small disc of ion selective polymer for contact with a measuring liquid, the ion selective polymer disc being in contact with a wire of low drift potential relative to the ion selective polymer disc. The invention also includes an electro mechanical measuring arrangement in which the ion sensitive electrode may be used and also a reference electrode suitable for use therewith.Type: GrantFiled: June 6, 1977Date of Patent: January 22, 1980Assignee: Dr. E. Fresenius Chemisch Pharmazeutische IndustrieInventors: Johannes G. Schindler, Werner Riemann
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Patent number: 4135999Abstract: An ion sensitive electrode comprises a small disc of ion selective polymer for contact with a measuring liquid, the ion selective polymer disc being in contact with a wire of low drift potential relative to the ion selective polymer disc. The invention also includes an electro mechanical measuring arrangement in which the ion sensitive electrode may be used and also a reference electrode suitable for use therewith.Type: GrantFiled: January 26, 1976Date of Patent: January 23, 1979Assignee: Dr. E. Fresenius Chemisch pharmazeutische Industrie KG, Apparatebau KGInventors: Johannes G. Schindler, Werner Riemann