Invention Grant
- Patent Title: Durable retroreflective elements with an ionic copolymer core
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Application No.: US15759044Application Date: 2016-09-06
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Publication No.: US11353640B2Publication Date: 2022-06-07
- Inventor: Matthew D. Wilding , Stephen L. Lieder , Eugene H. Carlson
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- Agency: 3M Innovative Properties Company
- Agent Carlos M. Téllez Rodriguez
- International Application: PCT/US2016/050411 WO 20160906
- International Announcement: WO2017/044425 WO 20170316
- Main IPC: G02B5/128
- IPC: G02B5/128 ; E01F9/524 ; G02B5/13 ; C08K3/40 ; G02B5/136

Abstract:
The disclosed retroreflective element includes a highly durable core with an ionic copolymer and a plurality of beads. These disclosed retroreflective properties remain intact even after continued application of external forces and stresses. Further, the ionic copolymer allows for beads to be loaded into the ionic copolymer of the core, securely disposed around the perimeter of the core, or both.
Public/Granted literature
- US20200241180A1 DURABLE RETROREFLECTIVE ELEMENTS WITH AN IONIC COPOLYMER CORE Public/Granted day:2020-07-30
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