US PATENT SUBCLASS 549 / 260
.~.~.~.~.~.~.~.~ Additional heavy metal, other than titanium, utilized

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


549 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
231  DF  .~.~.~ Cyclic anhydrides (i.e., -C(=X)OC(=X)-, wherein the X's are the same or diverse chalcogens, is part of the hetero ring) {2}
233  DF  .~.~.~.~ The cyclic anhydride is five-membered (e.g., succinic anhydride, etc.) {7}
256  DF  .~.~.~.~.~ Preparing by oxidation {2}
258  DF  .~.~.~.~.~.~ Of acyclic or alicyclic hydrocarbon {1}
259  DF  .~.~.~.~.~.~.~ Vanadium and phosphorus, in compound or elemental form, utilized {1}
260.~.~.~.~.~.~.~.~ Additional heavy metal, other than titanium, utilized

DEFINITION

Classification: 549/260

(under subclass 259) Processes wherein, in addition to vanadium and phosphorous, a further heavy metal, other than titanium, is utilized.

(1) Note. Titanium, if utilized alone, does not satisfy the requirement of this subclass for an additional heavy metal, whereas the combination of titanium with an additional heavy metal does satisfy the requirement.