US PATENT SUBCLASS 540 / 141
.~.~.~.~.~.~ Specified crystalline form or processes of milling (e.g., alpha crystalline form, ball milling, acid milling, etc.)

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

Internet Version by PATENTEC © 1999      Terms of Use


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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
121  DF  .~.~ Azaporphyrins {1}
122  DF  .~.~.~ Phthalocyanines {8}
139  DF  .~.~.~.~ Metal containing {1}
140  DF  .~.~.~.~.~ Heavy metal or aluminum containing {2}
141.~.~.~.~.~.~ Specified crystalline form or processes of milling (e.g., alpha crystalline form, ball milling, acid milling, etc.)

DEFINITION

Classification: 540/141

(under subclass 140) Compounds which are in a specified crystalline form, or processes for milling heavy metal or aluminum containing phthalocyanines.

(1) Note. The milling processes usually are for the purpose of obtaining certain crystalline forms.