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 (55) at least one solid polymer derived from ethylenic reactants only (88) mixing of solid block or block-type copolymer with other solid polymer; mixing of said polymer mixture with a chemical treating agent; mixing of a block or block-type copolymer with sicp or with spfi; or processes of forming or reacting; or the resultant product of any of the above operations (92r) mixture contains solid polymer derived from at least one saturated reactant, sicp, or spfi
Hierarchy/Derived subclasses
uspto searches
Patent Apps in 525/92r
Granted Patents in 525/92r
Use the links above or do an advanced search in
ppubs for:
(525/92r.ccls. or 525/92a.ccls. or 525/92b.ccls. or 525/92c.ccls. or 525/92d.ccls. or 525/92e.ccls. or 525/92f.ccls. or 525/92g.ccls. or 525/92h.ccls. or 525/92j.ccls. or 525/92k.ccls. or 525/92l.ccls. or 525/92m.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find
patents or patent applications in those subclasses.