ADDITIVE-CONTAINING MEMBER
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United States of America Patent
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Issued Date -
Jul 24, 2014
app pub date -
May 11, 2012
filing date -
May 13, 2011
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Abstract
An additive-containing member having first and second regions, the second region comprising a predetermined region (5) having a reduced strength limit relative to the first region so that the predetermined region is caused to break when pressure is applied to the additive-containing member, thereby to release additive, wherein the predetermined region is at a seal between two parts (1,2) of the additive-containing member.
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