Invention Grant
- Patent Title: Method for the production of structured cellulose patches or elements and devices made using such a method
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Application No.: US15023215Application Date: 2014-09-18
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Publication No.: US10173352B2Publication Date: 2019-01-08
- Inventor: Tobias Lendenmann , Maximilian Fischer , Simone Bottan , Aldo Ferrari , Dimos Poulikakos , Bernhard Winkler , Martin Grapow
- Applicant: ETH ZÜRICH
- Applicant Address: CH Zurich
- Assignee: ETH ZURICH
- Current Assignee: ETH ZURICH
- Current Assignee Address: CH Zurich
- Agency: Sughrue Mion, PLLC
- Priority: EP13185146 20130919
- International Application: PCT/EP2014/069882 WO 20140918
- International Announcement: WO2015/040106 WO 20150326
- Main IPC: A61F13/00
- IPC: A61F13/00 ; B29C41/00 ; A61F13/02 ; A61N1/362 ; C08L1/00 ; C08B1/00 ; C08L1/02 ; B29K1/00

Abstract:
A method for the self-assembled production of a topographically surface structured cellulose element. First, a mold is provided having on one side a first surface which is in a complementary manner topographically structured and which is permeable to oxygen. Next, a liquid growth medium containing cellulose producing bacteria is provided. Then, the mold is placed to form a interface such that the side of the mold with the first surface is in direct contact with the liquid growth medium, and an opposite side is facing air or a specifically provided oxygen containing gas surrounding. This allows bacteria to be produced and deposit cellulose on the first surface and developing on the interface a surface structured surface complementary thereto, until a cellulose layer with a thickness of the element of at least 0.3 mm is formed. Finally; the element is removed from the mold.
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