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Dialysis Solution Regeneration Method
Abstract: The present invention provides a dialysis solution regeneration method that exhibits high urea elimination performance even under a low-pressure operation and that can be simply used even at home. This dialysis solution regeneration method is a method for reducing urea concentration in an aqueous solution containing urea, and comprises a reverse osmosis step of using a reverse osmosis membrane element to obtain, from the aqueous solution containing the urea at an operation pressure of between 0.5 MPa and 2.0 MPa inclusive, a concentrated solution having a higher urea concentration and a permeate solution having a lower urea concentration. The aqueous solution containing the urea has a urea concentration of 0.5 g/L or higher, the reverse osmosis membrane element has a reverse osmosis membrane, and the reverse osmosis membrane has a pore diameter of 7.0 Å or less as measured using positron annihilation lifetime spectroscopy.
Notices, Deadlines & Correspondence
Patent Information
Applicants
TORAY INDUSTRIES, INC.
Inventors
1. OGAWA Kumiko
2. SHIMURA Harutoki
3. HANADA Shigehisa
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202147048346-CLAIMS [31-10-2022(online)].pdf | 2022-10-31 |
| 1 | 202147048346.pdf | 2021-10-23 |
| 2 | 202147048346-FER_SER_REPLY [31-10-2022(online)].pdf | 2022-10-31 |
| 2 | 202147048346-STATEMENT OF UNDERTAKING (FORM 3) [23-10-2021(online)].pdf | 2021-10-23 |
| 3 | 202147048346-PROOF OF RIGHT [23-10-2021(online)].pdf | 2021-10-23 |
| 3 | 202147048346-FORM 3 [31-10-2022(online)].pdf | 2022-10-31 |
| 4 | 202147048346-PRIORITY DOCUMENTS [23-10-2021(online)].pdf | 2021-10-23 |
| 4 | 202147048346-Information under section 8(2) [31-10-2022(online)].pdf | 2022-10-31 |
| 5 | 202147048346-IntimationOfGrant31-10-2022.pdf | 2022-10-31 |
| 5 | 202147048346-FORM 1 [23-10-2021(online)].pdf | 2021-10-23 |
| 6 | 202147048346-OTHERS [31-10-2022(online)].pdf | 2022-10-31 |
| 6 | 202147048346-DRAWINGS [23-10-2021(online)].pdf | 2021-10-23 |
| 7 | 202147048346-PatentCertificate31-10-2022.pdf | 2022-10-31 |
| 7 | 202147048346-DECLARATION OF INVENTORSHIP (FORM 5) [23-10-2021(online)].pdf | 2021-10-23 |
| 8 | 202147048346-Correspondence_Form1, Power of Attorney_21-06-2022.pdf | 2022-06-21 |
| 8 | 202147048346-COMPLETE SPECIFICATION [23-10-2021(online)].pdf | 2021-10-23 |
| 9 | 202147048346-FER.pdf | 2022-05-10 |
| 9 | 202147048346-FORM-26 [04-01-2022(online)].pdf | 2022-01-04 |
| 10 | 202147048346-FORM 18 [13-04-2022(online)].pdf | 2022-04-13 |
| 10 | 202147048346-FORM 3 [05-04-2022(online)].pdf | 2022-04-05 |
| 11 | 202147048346-FORM 18 [13-04-2022(online)].pdf | 2022-04-13 |
| 11 | 202147048346-FORM 3 [05-04-2022(online)].pdf | 2022-04-05 |
| 12 | 202147048346-FER.pdf | 2022-05-10 |
| 12 | 202147048346-FORM-26 [04-01-2022(online)].pdf | 2022-01-04 |
| 13 | 202147048346-COMPLETE SPECIFICATION [23-10-2021(online)].pdf | 2021-10-23 |
| 13 | 202147048346-Correspondence_Form1, Power of Attorney_21-06-2022.pdf | 2022-06-21 |
| 14 | 202147048346-DECLARATION OF INVENTORSHIP (FORM 5) [23-10-2021(online)].pdf | 2021-10-23 |
| 14 | 202147048346-PatentCertificate31-10-2022.pdf | 2022-10-31 |
| 15 | 202147048346-DRAWINGS [23-10-2021(online)].pdf | 2021-10-23 |
| 15 | 202147048346-OTHERS [31-10-2022(online)].pdf | 2022-10-31 |
| 16 | 202147048346-FORM 1 [23-10-2021(online)].pdf | 2021-10-23 |
| 16 | 202147048346-IntimationOfGrant31-10-2022.pdf | 2022-10-31 |
| 17 | 202147048346-Information under section 8(2) [31-10-2022(online)].pdf | 2022-10-31 |
| 17 | 202147048346-PRIORITY DOCUMENTS [23-10-2021(online)].pdf | 2021-10-23 |
| 18 | 202147048346-PROOF OF RIGHT [23-10-2021(online)].pdf | 2021-10-23 |
| 18 | 202147048346-FORM 3 [31-10-2022(online)].pdf | 2022-10-31 |
| 19 | 202147048346-STATEMENT OF UNDERTAKING (FORM 3) [23-10-2021(online)].pdf | 2021-10-23 |
| 19 | 202147048346-FER_SER_REPLY [31-10-2022(online)].pdf | 2022-10-31 |
| 20 | 202147048346.pdf | 2021-10-23 |
| 20 | 202147048346-CLAIMS [31-10-2022(online)].pdf | 2022-10-31 |
Search Strategy
| 1 | SearchHistory(50)E_10-05-2022.pdf |