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
2004-12-02
2009-08-04
Sellers, Robert (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C424S094100, C424S174100, C424S176100, C424S280100, C514S772700, C525S403000
Reexamination Certificate
active
07569643
ABSTRACT:
The present invention relates to novel polymeric compositions based upon An(BCB)Anpolyester/polyether multi-blocks. Compositions according to the present invention exhibit unexpectedly exceptional reverse thermal gellation properties and in certain cases, relatively low viscosities at approximately room temperature and extremely high viscosities at temperatures above room temperature (preferably at approximately physiological or body temperature, i.e., within a temperature range of about 32-40° C.). Compositions according to the present invention may be used advantageously in applications which make use of their reverse thermal gellation properties. Preferred applications for use of the present compositions include, for example, medical applications which make advantageous use of the inherent composition characteristic of being of relatively low viscosity at room temperature and much higher viscosity at elevated temperatures, especially body temperature.
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Cohn Daniel
Levi Avraham
Coleman Henry D.
Sapone William J.
Sellers Robert
Sudol R. Neil
Synthemed, Inc.
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