Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-10-23
2007-10-23
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S317100
Reexamination Certificate
active
11518654
ABSTRACT:
This invention concerns a (meth)acrylic acid type polymer, wherein the value S representing the quantity of an sulfur element introduced which is defined by the formula, S=(quantity of S contained in polymer)/(total quantity of S)×100, is not less than 35. This (meth)acrylic acid type polymer is a water-soluble polymer of a low molecular weight which has only a small impurity content, entails no precipitation of an impurity during the preservation at a low temperature, and excels in dispersibility, chelating ability, and an anti-gelling property.
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Notice of the Reasons for Refusal in Japanese Patent Application No. 200-289616.
Fujii Yoshikazu
Tsumori Takahiro
Yamaguchi Shigeru
Yoneda Atsuro
Bernshteyn M.
Mathews, Shepherd, McKay & Bruneau, P.A.
Nippon Shokubai Co. , Ltd.
Wu David W.
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