Description: 525 synthetic resins or natural rubbers -- part of the class 520 series / 525 synthetic resins or natural rubbers -- part of the class 520 series/() synthetic resins (class 520, subclass 1) (50) mixing of two or more solid polymers; mixing of solid polymer or sicp with sicp or spfi; mixing of sicp with an ethylenic agent; mixing of solid polymer with a chemical treating or ethylenic agent; or processes of forming or reacting; or the resultant product of any of the above operations (54.4) containing chemically combined natural resin or derivative thereof other than tall oil
Hierarchy/Derived subclasses
uspto searches
Patent Apps in 525/54.4
Granted Patents in 525/54.4
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ppubs for:
(525/54.4.ccls. or 525/54.41.ccls. or 525/54.42.ccls. or 525/54.44.ccls. or 525/54.45.ccls.)
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patents or patent applications in those subclasses.