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Douglas W. Hartford
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Sandown, NH, US
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last 30 patents
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Patent Grant
Process for extruding low density foam using water blowing agent
Patent number
5,788,889
Issue date
Aug 4, 1998
Amesbury Group, Inc.
Alan J. DeMello
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Patent Grant
Process for extruding low density foam using water as a blowing agent
Patent number
5,607,629
Issue date
Mar 4, 1997
Amesbury Group Inc.
Alan J. DeMello
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL