Assignee

LETTS JOHN

US·1 granted patent·19 citations·filing 2008–2008

Technology mixB32B1 C08J1 E04B1 Y10T1

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0183US8453390B2High density polyurethane and polyisocyanurate construction boards and composite boardsLETTS JOHN·Filed 2008·Granted Jun 4, 2013·19 cites·31 claims

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