The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2015
Filed:
Sep. 01, 2010
Norma J. Ofsthun, Lexington, MA (US);
Harold F. Sandford, Groton, MA (US);
Amanda K. Stennett, Waltham, MA (US);
Jiunn Yeong Teo, Pleasant View, UT (US);
Cheryl Ford, Ogden, UT (US);
Benjamin J. Lipps, Boston, MA (US);
Michael James Beiriger, Pittsburgh, PA (US);
Norma J. Ofsthun, Lexington, MA (US);
Harold F. Sandford, Groton, MA (US);
Amanda K. Stennett, Waltham, MA (US);
Jiunn Yeong Teo, Pleasant View, UT (US);
Cheryl Ford, Ogden, UT (US);
Benjamin J. Lipps, Boston, MA (US);
Michael James Beiriger, Pittsburgh, PA (US);
Fresenius Medical Care Holdings, Inc., Waltham, MA (US);
Abstract
A dialysate regeneration system for removing contaminants from spent dialysate according to this invention includes a dialysate circulation flow path including a pump that pumps spent dialysate through the dialysate circulation flow path, a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet, a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet. Ancillary to the two cartridges, the dialysate regeneration system further includes a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge, and a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.