Patents by Inventor Dilip H. Shah
Dilip H. Shah has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9254356Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: May 5, 2014Date of Patent: February 9, 2016Assignees: Baxter International Inc., Baxter Healthcare SAInventors: Dilip H. Shah, Todd Ing
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Publication number: 20140319030Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: ApplicationFiled: May 5, 2014Publication date: October 30, 2014Inventors: Dilip H. Shah, Todd Ing
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Patent number: 8828232Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: March 6, 2013Date of Patent: September 9, 2014Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Dilip H. Shah, Todd Ing
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Publication number: 20130248448Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: ApplicationFiled: March 6, 2013Publication date: September 26, 2013Applicants: BAXTER INTERNATIONAL INC.Inventors: Dilip H. Shah, Todd Ing
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Patent number: 8414768Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: June 11, 2012Date of Patent: April 9, 2013Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Dilip H. Shah, Todd Ing
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Publication number: 20120291875Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: ApplicationFiled: June 11, 2012Publication date: November 22, 2012Applicants: BAXTER HEALTHCARE S.A., BAXTER INTERNATIONAL INC.Inventors: Dilip H. Shah, Todd Ing
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Patent number: 8202547Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: January 17, 2011Date of Patent: June 19, 2012Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Dilip H. Shah, Todd Ing
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Publication number: 20110171271Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: ApplicationFiled: January 17, 2011Publication date: July 14, 2011Applicant: HHD LLCInventors: Dilip H. Shah, Todd Ing
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Patent number: 7883725Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: May 29, 2009Date of Patent: February 8, 2011Assignee: HHD LLCInventors: Dilip H. Shah, Todd Ing
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Publication number: 20090274774Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: ApplicationFiled: May 29, 2009Publication date: November 5, 2009Applicant: HHD LLCInventors: Dilip H. Shah, Todd Ing
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Patent number: 7544301Abstract: The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch and/or proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. The contents of the first and second vessels are emptied into a dialysate preparation tank and mixed with water to form a batch quantity of dialysate solution. Alternately, a dry acid and/or a dry citrate-containing base concentrates are dissolved separately in measured quantities of water to form liquid concentrates which are then used in conjunction with a proportioning machine to generate on-line a final dialysis solution stream.Type: GrantFiled: August 19, 2004Date of Patent: June 9, 2009Assignee: HHD LLCInventors: Dilip H. Shah, Todd Ing
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Patent number: 6355161Abstract: A set of bottles for containing dialysate chemical formulations, chemical cleaning agents or the like is described. The chemical formulation bottles come in two varieties, sodium bicarbonate and liquid acid formulations, each bottle having a slightly different shape. The different shapes cooperate with a bottle mounting structure in the dialysis machine to insure that bottles are correctly installed on their respective bottle opening mechanism. The bottles also have a detection feature comprising either a raised rim or groove extending around the periphery of the bottle. A sensor assembly in the bottle mounting and opening system detects the detection feature. The detection feature is used by the machine to distinguish between dialysate formulation bottles and chemical cleaning bottles, which do not have the detection feature. The detection feature prevents unintentional installation of the chemical bottle on the opening mechanism for the dialysate chemical formulation bottles.Type: GrantFiled: April 14, 2000Date of Patent: March 12, 2002Assignees: Aksys, Ltd., Teijin, Ltd.Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono, Wade Fournier, Mete Alpan
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Patent number: 6280634Abstract: A method of calibrating a dialysis machine to determine the volume of a dialysate flow path of the machine including a dialysate preparation tank includes the steps of introducing a known quantity of electrically conductive chemicals into the dialysate preparation tank, filling the dialysate solution flow path with water, mixing the chemicals with water to form a solution, measuring the conductivity of the solution, calculating the system volume (Vsys) according to the relation: Vsys=M/(a1r+b1) where M is the mass in grams of the chemicals, a1 and b1 are a coefficient of linearity and a constant of linearity, respectively, for the chemicals and r is the measured conductivity of the solution.Type: GrantFiled: June 9, 2000Date of Patent: August 28, 2001Assignee: Aksys Ltd.Inventors: Dilip H. Shah, Derek Wiebenson, Tom L. Brose, Shincy Maliekkal
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Patent number: 6136201Abstract: A batch of dialysate solution is made from a mixture of bicarbonate formulation and a liquid acid formulation. The liquid acid formulation is introduced into a dialysate tank and then removed from the tank and stored elsewhere, such as in an ultrafiltration tank, where it is diluted with a few litres of water. The dialysate tank is then filled with water and the bicarbonate formulation is added to the dialysate tank. The bicarbonate formulation is mixed and dissolved by circulation in a closed loop, with the liquid acid formulation kept separate. When the bicarbonate solution has been prepared, the liquid acid solution and the bicarbonate solution are mixed together and stored in the dialysate preparation tank. An additional quantity of dilution water is introduced into the dialysate system to bring the final conductivity down to the desired range. The excess dialysate solution can be used for several purposes, such as an endotoxin flush of the blood tubing set or a dialyzer clearance test.Type: GrantFiled: November 4, 1998Date of Patent: October 24, 2000Assignee: AKSYS, Ltd.Inventors: Dilip H. Shah, Derek Wiebenson, Tom L. Brose, Shincy Maliekkal
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Patent number: 5932110Abstract: A method of adjusting the final conductivity of a batch of dialysate to bring the conductivity down to a desired level is described. The batch of dialysate is prepared by mixing excess quantities (e.g., 5%) of dialysate solution chemicals with water to form a solution with a conductivity greater than that required for the particular batch. A measurement of the dialysate solution is taken. A precise volume of water is added to the dialysate solution to dilute the dialysate to the proper level. The precise volume of water is calculated from a known or estimated total system, the desired conductivity level and the actual conductivity. The resulting diluted dialysate is at the desired conductivity level. Excess dialysate which may be present in the dialysate circuit or associated tanks is then flushed to a drain. In a hemodialysis embodiment, the excess dialysate may be flushed through the dialyzer into the blood lines to rinse any pyrogens from the extracorporeal circuit.Type: GrantFiled: December 9, 1996Date of Patent: August 3, 1999Assignee: Aksys, Ltd.Inventors: Dilip H. Shah, Thomas M. Feldsien
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Patent number: D403079Type: GrantFiled: December 12, 1997Date of Patent: December 22, 1998Assignee: Aksys, Ltd.Inventors: Kenneth E. Pawlak, Dilip H. Shah, Donald C. Walker
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Patent number: D435646Type: GrantFiled: October 12, 1999Date of Patent: December 26, 2000Assignees: Aksys, Ltd., Teijin, Ltd.Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
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Patent number: D435647Type: GrantFiled: October 12, 1999Date of Patent: December 26, 2000Assignees: Aksys, Ltd., Teijin, Ltd.Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
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Patent number: D435648Type: GrantFiled: October 12, 1999Date of Patent: December 26, 2000Assignees: Aksys Ltd., Teijin, Ltd.Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono
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Patent number: D435649Type: GrantFiled: October 12, 1999Date of Patent: December 26, 2000Assignees: Aksys, Ltd., Teijin, Ltd.Inventors: Dilip H. Shah, Gary Howell, Kenneth E. Pawlak, Masatoshi Ozono