US PATENT SUBCLASS 525 / 272-- .~.~.~.~.~.~ Contains an atom other than Group IA, C, or H

US PATENT SUBCLASS 525 / 272
.~.~.~.~.~.~ Contains an atom other than Group IA, C, or H

Current as of: June, 1999
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525 /	HD	SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*	DD	SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50	DF	.~ 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 {32}
55	DF	.~.~ At least one solid polymer derived from ethylenic reactants only {25}
242	DF	.~.~.~ Polymer derived from ethylenic reactants only mixed with ethylenic reactant {21}
267	DF	.~.~.~.~ Including step of preparing a polymer in the presence of a specified material and in the absence of a preformed polymer derived from ethylenic reactant only {3}
271	DF	.~.~.~.~.~ Specified material contains a Group IA atom in elemental form or bonded to hydrogen or carbon {1}
272		.~.~.~.~.~.~ Contains an atom other than Group IA, C, or H

DEFINITION

Classification: 525/272

Contains an atom other than group IA, C, or H:

(under subclass 271) Subject matter wherein the specified material contains an element other than from Group IA, C, or H.

(1) Note. The word "contains" reads generically on the element whether found as an integral part of the specified material required for this subclass or in addition to the specified material.

(2) Note. Metal borohydrides, e.g., LiBH₄ are classified as if they are hydrides of boron and of the metal atom.

(3) Note. Metal hydrides (e.g., NaAlH_{4[end subscrpt]) are classified as if they are mixed hydrides of aluminum and of the other metal.}