Invention Grant
- Patent Title: Degradable cigarette filter: pill with multilayered coating
- Patent Title (中): 可降解香烟过滤嘴:多层涂料丸
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Application No.: US12687912Application Date: 2010-01-15
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Publication No.: US08397733B2Publication Date: 2013-03-19
- Inventor: Raymond M. Robertson
- Applicant: Raymond M. Robertson
- Applicant Address: US TX Dallas
- Assignee: Celanese Acetate LLC
- Current Assignee: Celanese Acetate LLC
- Current Assignee Address: US TX Dallas
- Agency: Hammer & Associates, P.C.
- Main IPC: A24B15/18
- IPC: A24B15/18

Abstract:
A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow and a plug wrap surrounding the filter element, and a pill dispersed in the tow. The pill includes a material adapted to catalyze hydrolysis of the cellulose acetate tow that is encapsulated with an inner layer of a water soluble or water permeable material and an outer layer of a cellulose acetate having a D.S. in the range of 2.0-2.6.
Public/Granted literature
- US20110174324A1 DEGRADABLE CIGARETTE FILTER: PILL WITH MULTILAYERED COATING Public/Granted day:2011-07-21
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