Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-04-03
2007-04-03
Keys, Rosalynd (Department: 1621)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C568S618000, C568S620000, C568S678000, C568S679000, C568S698000
Reexamination Certificate
active
10952198
ABSTRACT:
A process for making substituted polyethylene glycol compound. The compound has the formula RO(C2H40)nH wherein R represents a C1–7 hydrocarbon group and n represents the average number of moles of C2H40 groups, ranging from 500 to 2000. The compound has a ratio of weight average molecular weight to a number average molecular weight in the range of from 1 to 1.1. The compound contains less than ten weight percent polyethylene glycol. The gist of the process is the use of a polyether solvent, wherein the n value of the compound ranges from 600 to 2000.
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Appell Robert B.
Daugs Edward D.
Dow Global Technologies Inc.
Keys Rosalynd
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