Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2010-03-18
2011-11-08
Bernshteyn, Michael M (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S557000, C524S284000, C524S296000
Reexamination Certificate
active
08053504
ABSTRACT:
A polyvinyl butyral (PVB) resin has a meso/racemic stereoisomer ratio of from about2.5to about5.0. A process for preparing this PVB resin is described. Manipulation of the PVB stereoisomer ratio can provide an additional method of controlling the physical properties of a plasticized composition comprising the PVB resin, in addition to or in lieu of changing additives or otherwise manipulating the components of the plasticized PVB resin composition.
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Read, III Nolan K.
Rymer Donald L.
Bernshteyn Michael M
E. I. du Pont de Nemours and Company
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