Nano-porous anodic aluminum oxide membrane for healthcare and biotechnology
US11230786B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2019 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Jun 28, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of manufacturing a nano-structured aluminum oxide film. The first step involves degreasing an aluminum plate using a degreasing solution. The next step involves electropolishing the aluminum plate after degreasing with an electropolishing solution that is free of perchloric acid and chromic acid. The next step involves pre-anodizing the aluminum plate after electropolishing with an anodization acid solution for a first predetermined time period. The next step involves anodizing the aluminum plate after electropolishing with the anodization acid solution for a second predetermined time period to form an anodized membrane on the aluminum plate. The next step involves separating the anodized membrane from the aluminum plate with a solution free of chrome. The last step involves cleaning the anodized membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.