Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
2007-12-04
2007-12-04
McClendon, Sanza L. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
C522S125000, C522S150000, C522S184000, C522S189000, C522S157000, C523S115000, C523S113000, C526S352000, C526S352200, C526S072000, C526S073000, C526S348000, C623S011110, C623S016110, C623S013120, C623S018110, C623S021110, C623S021180
Reexamination Certificate
active
11464872
ABSTRACT:
The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene in contact with a sensitizing environment at an elevated temperature that is below the melting point, in order to reduce the concentration of residual free radicals to an undetectable level. A process of making irradiated crosslinked polyethylene composition having reduced free radical content, preferably containing substantially no residual free radicals, by mechanically deforming the polyethylene at a temperature that is below the melting point of the polyethylene, optionally in a sensitizing environment, is also disclosed herein.
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McKinley Gareth H.
Muratoglu Orhun K.
Spiegelberg Stephen H.
Cambridge Polymer Group, Inc.
Massachusetts General Hospital
McClendon Sanza L.
Proskauer Rose LLP
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