US PATENT SUBCLASS 528 / 48
.~.~ Process of polymerizing in the presence of a specified material other than reactant

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
44  DF  .~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
48.~.~ Process of polymerizing in the presence of a specified material other than reactant {5}
49  DF  .~.~.~> Material contains only one -C-XH,-C-C(=X)-XH or carbon to -NH or HNH group
50  DF  .~.~.~> Material contains compound having a -O-O- group, e.g., peroxide, etc.
51  DF  .~.~.~> Material contains a phosphorus atom
52  DF  .~.~.~> Material is organic nitrogen-containing compoud {1}
55  DF  .~.~.~> Material contains at least one metal atom {3}

DEFINITION

Classification: 528/48

(under subclass 44) Subject matter wherein a -N=C=X-containing reactant, wherein X is a chalcogen atom, i.e., O, S, Se, or Te, is polymerized in the presence of a specified material.

(1) Note. For purposes of this subclass, a compound having a single -C-XH, -C-NH2[supscrpt] [end supscrpt] -C-NHR, or (X is chalcogen) is always considered to be a nonreactant. Similarly, a compound having a single group is considered as a nonreactant except where the compound is a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil, in which case, if the compound is a reactant it is considered proper for Class 528, subclass 74.5.

(2) Note. For purposes of this subclass a compound having two or more or (X is chalcogen) or combination of functional groups is always considered to be a reactant.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for an explanation of the term "specified material".