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 (54.1) containing chemically combined protein or biologically active polypeptide
Hierarchy/Derived subclasses
uspto searches
Patent Apps in 525/54.1
Granted Patents in 525/54.1
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(525/54.1.ccls. or 525/54.11.ccls.)
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