Patent US5385564A successfully refreshed from Google Patents.
US5385564A
Expired / Lapsed
US
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System for preparation and use of dialysis solution
Assignee: Fresenius USA Inc
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Filing: 1992-10-05
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Granted: 1995-01-31
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Expires: 2012-10-05
Abstract
Abstract A system for packaging and using granulated solid dialysate concentrate. A bag is constructed to hold granulated or powder concentrate, having a V-shaped bottom with an access port in the bottom. Water is flowed through the access port and into the bag using suitable water control means. The incoming water lifts and suspends the granules or powder in a turbulent flow, thereby filling the container simultaneous with dissolving the granules or powder. The water with dissolve concentrate then constitutes the dialysis solution and is ready for use or transfer to a dialysate delivery machine.
Inventors
- 👤 Glenn L. Slater
- 👤 Jerry Woods
- 👤 Steve Alford
- 👤 Dave Updyke
- 👤 Rick Methe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:12
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1654; A61M1/1656; A61M1/1666; A61M1/1668; A61M1/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A method for preparing and using a dialysis solution, comprising placing an acid dialysate concentrate into a container, the container having a bottom portion to hold the dialysate concentrate, the bottom portion having a lower end with an access port and the container having a least one side that slopes in relation to an opposite side whereby the container has a width at the lower end that is less than a width above the lower end; sealing the container; flowing water into the container through the access port so that the flowing water produces turbulence in the bottom portion to simultaneously dissolve the dialysate concentrate in the bottom portion; and withdrawing the acid dialysis solution from the container.
Claim 2
Independent Claim
118 words
A method for preparing and using a dialysis solution, comprising placing an acid dialysate concentrate into a container, the container having a bottom portion to hold the dialysate concentrate, the bottom portion having a lower end with an access port and the container having a least one side that slopes in relation to an opposite side whereby the container has a width at the lower end that is less than a width above the lower end; sealing the container; flowing water into the container through the access port so that the flowing water produces turbulence in the bottom portion to simultaneously dissolve the dialysate concentrate in the bottom portion; and withdrawing the acid dialysis solution from the container.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein the concentrate is dissolved before the step of flowing water into the container is completed.
Claim 4
Dependent Claim
48 words
The method of claim 1, wherein the container with the water has a weight, and the step of flowing water into the container includes monitoring the weight of the container with the water and tripping a switch to discontinue the flow when the weight reaches a known amount.
Claim 5
Dependent Claim
14 words
The method of claim 1, wherein the acid dialysate concentrate is a granulated solid.
Claim 6
Dependent Claim
38 words
The method of claim 4, wherein the incoming water through the port urges the solid granules upward while the weight of the granules urges the granules downward toward the access port, thereby suspending the granules in the water.
Claim 7
Dependent Claim
143 words
The method of claim 1, further comprising placing a bicarbonate dialysate concentrate into a second container, the second container having a bottom portion to hold the bicarbonate concentrate, the bottom portion having a lower end with a second container access port and the second container having at least one side that slopes in relation to an opposite side whereby the second container has a width at the lower end that is less than a width above the lower end; sealing the second container; flowing water into the second container through the second container access port so that the flowing water produces a turbulence in the bottom portion to simultaneously dissolve the bicarbonate concentrate in the bottom portion; withdrawing the bicarbonate dialysis solution from the second container through the second container access port; and mixing the acid dialysis solution with the bicarbonate dialysis solution.
Claim 8
Dependent Claim
13 words
The method of claim 6, wherein the bicarbonate dialysate concentrate includes sodium chloride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |